Unless it is like a wrong back card, there is literally no value in them, they came from the junk era of sports cards. The only cards which have much value from that era are the Billy Ripken FF error from 89 Fleer and the Dale Murphy reverse negative error from 1989 Upper Deck.
The owner was kind of rude and talked down to my friend and I which were trying to sell some very old cards and he said if they were not typos he didn't want them and we're wasting our time
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