dave emler says it's a game changing trend. >> it is not like that anymore if you are warm armed with the information. if you can show a print out on your trade in, which it is worth and show a print-out of what it costs and what the true market value is, you can't argue with that. you don't need to haggle. if you do your home work, because it is a big purchase, you don't need to haggle anymore. >> reporter: joe vasquez, kpix5. >>> you may as well buy the convertible. you will use it quite a bit in the next few weeks. >> right. that's true. that is one of the silver linings. >> there you go. >> we do have a nice night. high clouds thereupon, but not much in the way of rain. not any time soon. concord, 41, san francisco, 50 degrees. santa rosa, 38. spare the air day in effect today and tomorrow with unhealthful levels of particles in the atmosphere. for tomorrow, we will look at numbers coming in at 67 degrees in the bay and 66 inland. a nice warm bay this time of the year. it is snow and ice, but we could use the rain. measure that way, just 22% of average in san francisco. that is th