I have about $16,000 in Magic: The Gathering cards, although I actually use them to play, and not strictly to collect, but they're going up in value! (At least, that's what I tell my wife)
Are your sure about that figure? They're only worth what someone else will pay you for them.
And for the OP... as a Cardinal fan, I love your collection.
I really only collect a shot glass or two from any place I travel... Certainly nothing that will ever be worth more than I put into it, but at >$5 a pop, I'm not too worried about it.