Interesting. ripoffs in China fall into 2 categories. First, the knock offs. If these are in that category, then they will be really cheaply put together using the cheapest possible components, and probably not running webOS but some other operating system, most likely Android, as it would take a good bit of skill and connections to rip off the real webOS operating system and get it working.
There's also the possibility that they don't even function and can only be used as a paperweight. If that happens, the scam will be they'll probably ask you to send it back, but of course the shipping costs will be the probably more than the item is worth. Some people will just write it off as a loss, saying the only spent $50 bucks, and that's where the scammer wins. Most will go to the trouble of filing a dispute with Paypal though, and in most cases Paypal will side with the buyer and give them their money back. Of course the scammer may have already withdrawn some of the money from their account by that time (it takes almost 2 weeks to ship to you, and although Paypal might place a hold on some funds they won't do it on all of the funds, so that's plenty of time for them to get some money). In that case Paypal will end up suffering the loss.
The other category of fakes are "back door" items - products that were put together in the factory that actually makes the products for HP or whoever, either from surplus components, or are seconds that didn't pass the quality inspection. If these are either of those, then you could possibly get a deal. I doubt that highly though, as with 32GB TP's still selling for $250 on eBay, why on earth would any seller that wants to make a profit sell them at $50 and include free shipping? That means they're only getting $20 to $30 on each one, and they would have had to pay their guy at the factory something, right? So this makes no sense. Even if they stole them off a truck, they could sell them for $100 + shipping and they would still sell like hotcakes.
Lastly, the fact that the seller has good reviews looks good, but when you read the feedback it's mostly about jewelry. That makes me wonder whether the eBay account may have been hijacked by someone else? Even if that's not the case, I notice that the 3 negatives that they received were from people complaining that the items were fake. So....maybe this is a Category 1 scam after all?
If anyone is brave enough to risk their $50, it'd be very interesting to discover exactly what kind of scam this is...