On the list of the 10 most expensive sports memorabilia items, one would mostly find baseball stuff: A Babe Ruth signed ball from the 1918 World Series and a Mickey Mantle bat from 1953, among other things. But there’s also one of the most impressive collection of NHL jerseys and basketball cards by Fleer, although the one that stands out the most is the unique Florida Gators motorcycle, signed by the one and only Tim Tebow.