I have a bunch that I collected in the 80-90's. I need to go through them because you don't know what you might have. I might have some guy who at the time was an unknown guy......but has since become HOF material. I do have a Walter Payton, lots of early Michael Jordan, autographed Barry Sanders, etc, etc.
I've also wondered what it would be like to buy guys who are really hot. Let's say, Patrick Mahomes. Right now, he's a guy who has played 4 years and won a SB......so, his rookie card might be bought for just a couple of bucks right now.......but his career trajectory is stellar right now. I wonder if you bought a collection of cards like these over a few decades if you would come out ahead.....and by how much?