this is "nightline." tonight, real deal steals. getting ready for black friday a week early. the best deals are already out there, and you can get your hands on them before the mobs roll in. plus, man versus lion. how close can he get, and why on earth would he want to? tonight, we're going in to a feeding frenzy. and, home sweet home. the most expensive house ever. a rotating dance floor is just the beginning. but first, the "nightline" five.

number one in just 60 seco

♪ good evening, thanks for joining us. thanksgiving is just around the corner. but if you think the best sales are a week away, think again. we're with a true bargain

hunting guru. here's rebecca jarvis. >> reporter: forget the black friday madness. now, the deals are starting before you put the turkey in the oven. these are just some of the retailers that have already cut prices. and some of the best deals are on monday. we went on the hunt for secret savings, all the way to target headquarters in minnesota. this is a working mom, a blogger, and a deal hunter. what's the biggest about of savings you have had? >> between 30% and 50% off. >> reporter: using target's app cartwheel, using personalized hidden deals.

>> i usually buy the big box of the wipes. >> reporter: there's no signage saying it's on sale. >> you could have 5% off of any of these. >> reporter: there are dozens of ways to save money. these apps instantly let you see prices at thousands of retailers. is this the new candy crush? >> it's better. this is real life, real savings. it's like the gameification of savings. >> we'll preview black friday on wednesday, and then offer 50% off target gift cards. it's game time.

we think about it all year. we released the circular online. >> reporter: feel the savings. and it's full of deals. >> $499 on the ipad air 2 with a gift card. this is the best deal on black friday. you can get 50% off a new toy every day. >> reporter: 50% off boys' pants. even the turkey, 30% off. at checkout, she gets almost $10 off her total. >> when i total, it takes the cartwheel discount. >> oh, my gosh. >> reporter: you said. >> smart savings, right? >> reporter: but $10 is just a drop in the bucket. could she save any more? we put her up to the test.

you went out, you have to buy $150 worth of gifts. two kids, mother-in-law, husband. i'm going to do it without the app. i'm a pretty good deal shopper. >> but you don't know what you don't know. >> reporter: we'll see you at the cash register. i did a run through with mark elwood. number one, just ask. >> say, hey, was this tv here last week, or did you bring it in last night? if you're nice, they're going to explain everything. once you tap them gently, they'll open right up. >> reporter: number two, turn to social media. >> you would be astonished how discounts are put out just

through twitter or advanced through twitter. >> reporter: when all else fails, just smile. >> nothing beats an old-fashioned smile. just like that. say hello, i want to best deal i can. >> reporter: my smiling was no match for the app. merry christmas. are there any discounts here? zero. i'm left wandering the aisles, looking for discounts on toys. while alice shops with precision. >> here we go. 20% off jewelry. trying to decide which one looks good. >> reporter: oh, hello. >> hi. >> reporter: how is it going? >> great. i'm doing a lot of saving. >> reporter: we scored deals for our mother-in-laws. oh, "gone girl." 20% off. >> these are regularly almost

$25, going down to $20. plus i get another 20% off. >> reporter: i'm going to give my husband a roku and a coupon book for free hugs. >> i'm getting a coffee maker, 20% off. >> reporter: we start off almost exactly tied. $157.10 and $157.11. but she has some tricks up her sleeve. >> i'm going to scan my cartwheel. and can i use the mailer? >> reporter: her bill of $157.11 drops down to $102.42. saving her almost $55. humbled, i'm forced to admit defeat. nice work.

you definitely beat me by a lot. up next, we're going into the wild. coming nose to nose with some hungry lions. and later on "nightline," the most expensive house in america opens up its doors. and you'll never guess what's inside. what happened? stress, fun, bad habits kids, now what? let's build a new, smarter bed using the dualair chambers to sense your movement, heartbeat, breathing. introducing the sleep number bed with sleepiq™ technology. it tracks your sleep and tells you how to adjus r a good, better and an awesome night. the difference? try adjusting up or down. you'll know cuz sleep iq™ tells you. give the gift of amazing sleep, only at a sleep number store. find our best buy rated c2 queen mattress with sleepiq. know better sleep with sleep number. so far, you're horrible at this, flo. yeah, no talent for drawing, flo. house! car! oh, raise the roof! no one?

remember when we used to raise the roof, diane? oh, quiet, richard, i'm trying to make sense of flo's terrible drawing. i'll draw the pants off that thing. oh, oh, hats on hamburgers! dancing! drive-in movie theater! home and auto. lamp! squares. stupid, dumb. lines. [ alarm rings ] no! home and auto bundle from progressive. saves you money. yay, game night, so much fun. man (mr. mucus: tore do you work, with you.ing? it's taco tuesday. man: you're not coming. i took mucinex to help get rid of my mucusy congestion. i'm good all day. [announcer:] mucinex keeps working. not 4, not 6, but 12 hours. let's end this

you've no doubt heard of the shark tank. but have you ever heard of a lion box? tonight, we're going inside one

smack in the middle of a feeding frenzy. all for a surprising reason. here's glory ya riviera. >> stop. i can see lions. >> reporter: these three lions, all brothers, reign supreme in this game preserve. >> just come across right here. >> reporter: following their every move, boone smith. >> they're going to make a go at the hippos here. when those lions locked on the hippos, it was lightning fast. >> reporter: we're here in south afri africa, to put himself squarely on their turf.

man versus lion, capturing it all on camera. >> i wanted to be a member of the pride. see that point of view. i've been tracking three of them all morning. >> reporter: he makes his living tracking and trapping big cats all over the world. he's a throwback to a far more wild era. a fourth-generation tracker. he's tagged everything from cougars in idaho to snow leopards. >> there's an addiction to the adrenaline. the adventure, what's over the next hill, down the next valley. >> reporter: we set out with him to get a taste of that feeling. it's dawn, and it's very early.

he gets to work, tracking the queen lioness. he knows she's had three new cubs, but no one has seen them. and ranger greg is with us, with a magnum just in case. >> we're going to go very slowly. >> reporter: but danger finds us fast. oh, my god, there's a rhino right there. a rare white rhino. and they're blocking our path. and they pass, and they manage to spot the mama lioness. >> that one just broke the bushes. >> reporter: they're barely visible with our binoculars. what do you think? >> i think we better go look. >> reporter: are the cubs still

alive? we're going to go a little bit higher. so we can see her, but she may not be able to see us. >> we're going to tiptoe. i've got eyes on her. >> reporter: once we're in position, a clear view through the brush. she's looking right at us. >> the cub is right underneath here. >> reporter: what's it like to see this? how unusual is it? >> we're pretty fortunate to see this. >> reporter: that's as close as we get. but he's taking it to a whole new level. you have a wife and kids. what is her reaction? >> she gave up on me a long time ago. >> reporter: she's the one person that needs to give the

world's best big cat tracker the okay. >> i stay in the car. can you bring that lion to me? >> reporter: his latest project, put himself inside a custom-made box during a feeding frenzy. >> i was like, what are you talking about? >> well, it could be really dangerous if you don't do it right. >> reporter: it had to be able to withstand an attack from a group of hungry lions. >> it broke. it's half the thickness. now, the real deal. i'm feeling better about that. i think this is safe and good to go. time to head to africa. here we come. the box will put me inches away from the lions while they feed.

>> reporter: and so, after months of planning with the box in place, there's just one task left. >> we've just locked ourselves in the box. two lions are very close to us. i can hear lions roaring. >> reporter: it takes just 20 minutes. four lions converge on the box. three brothers plus a new female. >> do you hear that? scratching the glass. they're right there. you can hear your heart just going. not so much out of fear, but just excitement. there's a 500-pound lion right

next to me. one of the brothers. get ready. it's going to get wild. >> reporter: inside the box, boone has a front-row view of the rapidly-changing dynamics of the brothers. >> they had worked together to support each other. now, a female is in the mix. that changes the dynamic. >> reporter: they fend off their brother's attempt to feed. >> there's a point, are they going to challenge their older brother? wh who's going to win the right to breed? oh! we're getting crushed against the tree here. >> reporter: do you know anyone else that has had this experience? >> lions have the confidence, they let us view them.

just one inch away, i can put my hand. it's a rare and magical moment. >> reporter: a unique view, not for the faint of heart. >> big cat week kicks off with the premier of man versus lion on friday, november 28th on nat geo wild. next, $195 million gets you all this and more, and we'll take you inside.

man (sternly): where do you think you're going? mr. mucus: to work, with you. it's taco tuesday. man: you're not coming. i took mucinex to help get rid of my mucusy congestion. i'm good all day. [announcer:] mucinex keeps working. not 4, not 6, but 12 hours. let's end this

you know, it's quite possible to live like royalty in america, if you hee a couple million dollars to spare. you could have your own turkish bath and a vineyard. here's nick watt. >> reporter: in centuries to come, people will look back and judge us for things like this as a culture. how do you stop curious touri s tourists? >> we screen them very carefully. >> reporter: turkish baths in the master suite.

53,000 square feet, 23 bathrooms, 25 acres of beverly hills. there's a vineyard. is the wine any good? >> it's fabulous. >> reporter: and jeff green, the owner, worth $300 million. he's got loads of houses. >> yes. >> reporter: he wants $195 million, the highest asking price ever in the united states. that's the biggest couch i've ever seen. outside, parking for 150 cars and a lounge for the chauffeur. and a stage, a green room, a revolving dance floor.

>> we're moving. >> reporter: so, what does this say about our culture? what will our great, great grand kids say about this? you decide. nick watt for "nightline," in beverly hills. >> oh, boy. thanks for watching abc news. tune in for "good morning america" tomorrow. and we're always on abcnews.com. good night, america. have a great weekend. [ yelling ]

hey, we don't have to have this cowboy party on saturday. i'll get my scissors and cut your birthday right out of the calendar. [ doorbell rings ] oh, come on! maybe this is a bourbon salesman. mom, hi. oh, my gosh. you know you're early. the birthday party is not for twowo days. no, i know. i came today because i wanted to talk to you.

oh, okay, but why didn't you call? your father and i have separated. marie: hello, lois. hi, marie. i saw you drive up. was i given the wrong day for the party? what? what's going on? did -- did i miss something? i think i missed something. it's okay. we'll see you later, okay, marie? but i think i missed something. if anybody needs to talk to me, i'm just right across the street. i have marble cake!