The ones that are reliable:
mountaviewmovies
sellerkey
chinavasion
megagoods
dbldistributors
zreiss.com
And so on.....Just check Salehoo's official staff reviews for ones that are 'RELIABLE' on a most reliable basis. That's how I knew how to do things right I followed the reviews.
You wouldn't trust anything that just seemed to pop out of nowhere, has a funny name to it and no reviews would you?
Neither would I!!!! Through such questions, I've had great success with DHGate, Chinavasion and elsewhere in selling legitimate products to consumers & building up something to last.
But, I've also seen many scams and lies. By being smart I correctly never gave out my money or personal information for those scams. I reported them and got most of those scams shut down. In the longrun however, reviews tell alot.
They just aren't the whole story. You are going to have to talk to people, interview them, know your suppliers like you know yourself. Then you'll be fine.