Yeah, I have found this out the hard way. It really is most unfortunate. At least with Chinese retailers, prices are cheap.
There are actually some very reliable ones that I have established solid relationships with over the years, dsflashcart being one of them. Chinese shops are really good if you're willing to wait. Thing is people just go in blind and they're like THESE ASSHOLES SCAMMED ME BECAUSE MY STUFF HASN'T COME FOR A WEEK. ._.