This website called GoodDealGames.com is selling bootlegs of Sega CD games and they are making their way to eBay. That site is acting as the distributor for them, no doubt.
Some eBay listings of the boots-
http://www.ebay.com/itm/261449007473...84.m1423.l2649
http://www.ebay.com/itm/251504076767...84.m1423.l2649
http://www.ebay.com/itm/151257367500...84.m1423.l2649
Gotta love the disclaimers left on those toilet paper notes. "Not affiliated with or endorsed by Sega Enterprises or Sony Computer Entertainment."
Here is an example of what a legit game is supposed to look like-
Compare it to the very close-looking bootleg-
I mean, you almost can't tell the difference! It's so good, ain't it? Makes me wonder how eBay lets these listings linger on after they've been reported ad infinitum. Oh right, because they get a cut of the sale price.