he paid around 50,000 for a nearly 100-year-old baseball signed by hall of famer christy matthewson. n bucks. valued at a quarter 15 years ago he spent 65 grand on this babe ruth baseball bat. it was notched by the bambino himself. price tag today, around $1.5 million. of all purchases jim's ever made, the one he's most proud of is hidden in this hand crafted wooden briefcase. memorabilia expert dave hunt is here to tell him what it's worth. inside the case, a collection of 19 balls dating back to the early 1900s. all signed by presidents. >> theodore roosevelt. that's impossible. >> reporter: from teddy roosevelt to barack obama. not one chief executive is missing. it took jim 20 years to hunt down each autographed ball. harding cost him 50k. jfk cost about 18,000. obama's he got for free as a gift. all in, jim spent around 200 grand on the balls. >> this is literally breathtaking. >> reporter: dave estimates the ultimate commander in chief collection could be worth between 1 and $2 million. he puts the value of all the memorabilia jim's amassed at around 20 million bucks. jim has n