I generally make sure the seller has a lot of good feedback and I read the negative reviews to see what could potentially happen... so far I have recieved all 18 items I have ordered and one I paid over 400 dollars... no negative experiences yet... have more horror stories of ebay! Atleast on aliexpress you can see what people are saying about an individual poduct to paint a clear picture of what you might feel... on ebay it can be a gamble... you might get junk