I've had a more misses than hits with this site. First off, be careful with bidding on any jewelry. I personally wouldn't bid over ten dollars on any jewelry item due to the quality not being what they claim it is. I ordered a set of earrings from a 3 dollar auction win. Not a whole lot so no complaints there but they weren't anywhere NEAR the quality they claim they were. Most of the jewelry seems to be more fashion/costume jewelry than high end jewelry. If it seems too good to be true, it probably is.
Secondly, it takes FOREVER for some of the sellers to ship their items even if they're in the US. It took a seller almost a week and a half to even get my item dropped off in the mail. I sell clothing/fashion items on Ebay and Poshmark and I make sure I get all my items shipped the within 24 hours of ordering. It's just good customer service.
Finally, be aware of purchasing any items from China. It's more than likely to be very low quality. Many times buyers who purchase from China don't even received their items and they will more than likely not refund you because they don't really have to.
I will probably never order from this site again due to low quality products and the high risk of being ripped off. However if you choose to risk it, at lease stay vigilant and pay for your items through the Paypal options.