I probably spent about $100 total on sports cards as a kid. I never bought an individual card, just a random pack of cards every once in a while. I had a frie

I probably spent about $100 total on sports cards as a kid. I never bought an individual card, just a random pack of cards every once in a while. I had a friend with thousands of cards. His dad was a doctor and he would buy multiple boxes of Topps, Fleer, Upper Deck, and more. He would open one and categorize everything in 3 ring binders. Then he would have unopened complete sets. He also had a hundred or more individual cards in plastic cases. I know he had a Ken Griffey Jr. rookie card. That one is probably still worth a lot. It was cool to look at and that kid is a successful lawyer now but I haven't seen him in 15 years. I wonder if he still has all those card. They took up multiple book shelves in the guest room they had.