Being like eBay is why it's full of chaff. There's a lot of really bad hardware on Aliexpress.
You either take a gamble on something and hope it's good, or try to buy the same thing that someone else bought and reviewed.
Have you heard of paying with PayPal/credit card?
I always figured that was the trade-off for paying 1/3 the price. Having to buy 3x as many to find a good one. :P