[t206blogcom]

I can't say whether or not SGC will mark it as an overprint, especially not having seen scans/pics.

I'm responding blind since you haven't posted scans, but there could be a premium to the right collector. If the cards are commons, then I'd say a small premium, again, to the right collector. If the cards are of HOF's, especially the bigger ones such as Cobb, I'd say the premium would be higher.

How much of a premium is anyone's guess, especially not knowing the condition, player or seeing pics.