99.9% it is real - shows the tape and editing marks that are very common for original Topps art, and I think the odds of a faked Jim Lefebrve are low. I think the majority of the original line drawings were sold in the 1989 Topps "Guernsey" auction, although as mentioned, they do pop up from time to time in the Topps Vault auctions.
Just as everyone has said, every one is one of a kind, so it is really driven by the player, year, team and content. Player and team collectors who are interested in oddball one of a kind items will pay a decent price, and sometimes you can just never tell, but $10 is low - I think $20-$30 is more in the ball park, and I do collect some of the Topps original art and follow the auction results. I remember a few years back when Topps was selling some early 70s football artwork through the Vault, a well heeled buyer was paying upward of $100 for commons (if he had to) but would generally win them in the $25-30 range. HOFers can go very high, but sometimes are surprisingly affordable.
Unfortunately, very little info is available about who did the artwork, but they contracted out with some comic book artists for some of their artwork. Although I have never seen a signed piece of line art, I have some from the 60s that were clearly drawn by Jack Davis, and some non sport artwork done by Wally Wood.
Neat items - happy collecting!
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