Congrats! There's nothing quite like finding one of those elusive cards.
I've been slowly working on trying to complete the Chipper base card run, which doesn't sound too difficult...until you get down to the last 20 or so, and they are all cards that you've never even seen before. I was happy because I just picked up a card that I had been looking for for several years, but certainly not 21 years.
I can't even imagine how the 21 year search conclusion must feel.