My favorite is a
Paul Pierce #34 light blue authentic
baseball jersey ... it's the one I wear to games because I have NEVER seen one like it and I've met a lot of people because of it, (folks asking where I got it and how can they get one, etc. - great conversation piece). It cost me a chunk of change, but I've had more than one person offer me
much bigger chunks for it, and one "expert" who said that it would be worth much more with each passing year, (especially after he retires). Guess I'll hang onto it a while.
I also have a basketball signed by the 1986 Championship Team, a Larry Bird-signed basketball, a pair of Dee Brown-signed Reebok pumps, and a bunch of signed caps, jerseys and cards from guys like Cousey, Heinsohn, Parrish, McHale, White, Russell, Havlicek, and more. Some other stuff that's not as important, but still special to me for other reasons.