I collected baseball cards on and off for a while. I haven't bought any for years but I still have all the ones I ever bought. I always just bought packs though. I never really invested in individual cards.
If I remember correctly, that Ken Griffey Jr. card is from the first year Upper Deck produced baseball cards. I bought a binder with a bunch of Upper Deck cards from that year at a yard sale long ago (probably pretty close to the year they came out). I forget whether that Ken Griffey Jr. card was one of them or not though. I don't think it was but maybe...
That was the iconic card every kid wanted when i was younger. As we know the cards were mass produced but getting one graded a PSA 10 perfect condition it's worth a lot of money now.