1974 Topps Football PSA 10s

Hi,
I am currently putting together a 1974 Football set in PSA 8 or better. I have been doing this for the last couple of years and have recently noticed that some of the larger Ebay card seller have all of a sudden had a great deal of PSA 10s from this set to sell. Do you think that there was a recent find of Gem Mint raw cards, a recent find of uncut sheets that are being cut and submitted or what? Any knowledgable opinions would be appreciated. Thanks.
I am currently putting together a 1974 Football set in PSA 8 or better. I have been doing this for the last couple of years and have recently noticed that some of the larger Ebay card seller have all of a sudden had a great deal of PSA 10s from this set to sell. Do you think that there was a recent find of Gem Mint raw cards, a recent find of uncut sheets that are being cut and submitted or what? Any knowledgable opinions would be appreciated. Thanks.
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Comments
<< <i>They probably busted a vending case or rack case. >>
That's one explanation.
Raw: Tony Gonzalez (low #'d cards, and especially 1/1's) and Steve Young.