I'd guess Super Bros. 6 is the same half-assed Tiny Toon Adventures hack I've played before. (because the pirates only bothered to copy half his frames, Mario just morphs into Buster Bunny at random)
It's probably against the rules but that doesn't stop boatlaods of listings.
I wouldn't recommend selling pirated goods on eBay. They are incredibly touchy about these things even though the mainstream market isn't focused on them.
Throw them up on ebay, should have no problems with them.
Start the listings at $15 or so, as $10 - $15 would be a fair rate per cart. If bidders decide to go crazy, you might luck out and get $30 or so.