Those red and blue ones from china are the ones im currently bidding on, and i'm really worried because the seller claims they are real jerrys yet that plastic bit you mention in the description plagues me. And they are far too cheap at the moment, $46 for two decks? Even though they are unopened its surprising they don't have a reserve...
I'm making sure i have saved contact between me and the seller with him stating they are completely genuine, so therefore i have a good case to send them back if not so.
That's a good idea bud. You might wanna also check out eBay's policies regarding that sort of thing if you haven't already - if they're indeed fake it's entirely possible the seller won't accept a return.