I used to have about 500 cards, some of them very rare, and a gold plated Charizard card. But (silly me) in elementary school, I gave the charizard to my friend, not knowing how much it was worth, and by the time I had found out and asked her if we could sell it, she had moved houses and the card was lost.
Plus I've been giving the cards to kindergardeners at my school, and they seem really happy about it.
"Life is a winking light in the darkness. ~Hayao Miyazaki"