Many of those sets without logos from the late-70's to the early-90's were produced by a company called MSA (Michael Schlecter Associates). And as far as cards with no logos being illegitimate, even Topps football in that era didn't have logos!
There's a lot of clowns on ebay that tied up BIN and auctions for 1000's of dollars worth of cards and then pick and choose the one's they want to pay for, makes sense if you end a listing you need to pay right away. The multiple items thing is very valid though, maybe they need to have a 30...
Reading these stories I wonder if he's on the (autism) spectrum somehow. There are over 1,000 players on major league rosters, there have to be a few, right?