Vintage card regrets

[hcv123]

So, In contemplating the question and thinking about many cards I've sold - As close as I could come to regret was a 1971 Bazooka numbered panel of Clemente - which is a legitimately tough item to find and I am not sure I will own one again. Other than that, seeing some of the prices of cards today that I sold years ago, it would have been nice to have them to sell for today's prices, but I don't much regret not having the cards and got at the time very fair prices for them - the worst - I sold a raw 1968 3D Clemente at the time PSA was becoming more known and there was much controversy whether they would last and be accepted in the hobby. It was in great condition - I would have called it near mint. I sold it for $6500. The collector I sold it to immediately sent it to PSA for grading - it came back a 9 - within a few months I watched a 9 sell at auction for about $30k!! Pain - yes, regret no.