As long as you are just talking about PSA cards, PSA offers it on their website for free. I'm not sure how complete the data is, but I guess it gives you some decent idea. For example if you wanted to buy a 1975 Topps Brooks Robinson PSA graded, you could find that data here:
https://www.psacard.com/auctionprice.../values/192812
Not perfect, but it is free.
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Actively bouncing aimlessly from set to set trying to accomplish something, but getting nowhere
Last edited by PowderedH2O; 05-14-2020 at 12:18 PM.
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