It's probably just an open box with nothing inside but air! Get it? Open Box! hahaha :haha
Seriously, $33 is below dealer price so I can't see these units or listing being authentic!
Notice how he simply copied the listing from the Shop4FTA eBay store who sells it for $119.99.
This is the listing he copied:
http://www.ebay.com/itm/NEW-OPENBOX...932?pt=LH_DefaultDomain_0&hash=item43a7356fcc
If you take a look as his account, you will notice that he only has been a member since August 17th of this year and this listing is only 2 days old. This is clearly a fraudulent seller and I doubt he will even ship any of the ordered items. In regards to the single positive feedback on his account, notice that it was left on August 22nd, 1 day after the item was first listed and the buyer is listed as being from China. This must have been some hell of a shipping service! I'm guessing the seller paid $300+ for FedEx next day shipping to China just to get positive feedback on a $33 item!