SellerKey.com is very good and is also LightinTheBox.com.
They are actually a very legitimate recognized dropshipping company.
For more information, look at Salehoo's reviews.
These are not scamming sites. But they aren't foolproof. They have LESS problems with counterfeit merchandise, but that doesn't mean they are above board.
Always talk to them at length and ask good questions, they are very responsive and answer almost anything. If you're not sure ask them, they are always around to give you a good answer.
As with any dropshipping site there are some bad products there too, just not that many. Learn first then sell.