You'd need one to properly address your question. So many factors in play. The thing that has been shocking the heck out of me is the prices some of the vintage material (particularly T206's) have been bringing at auction - really strong. Will it continue? That is the million dollar question. I can't tell you how many times I thought prices in our hobby market couldn't be sustained. I remember when PSA was getting started and I had a friend was buying any PSA 9 Clemente's he could find and spending like 5-10 times the amount raw ones were going for - I told him he was NUTS! Years later he laughed all the way to the bank
Just never know.