I, personally, have a collection of die-cast (Sort of metal) NASCAR cars. I think I have about 75-125 die cast cars in perfect/mint condition. I dont do anything with them, except look at them and admire them. I hope one day they might be worth something, if they arent, well they still look cool.
I also collected DC Comics cards way back when I was a little kid, I think the cards are 10 years old this year, and I have the full set for that year, and all but 1 are in perfect condition.
So what does everyone else have for collections?