sorry to hear this but you are not the first victim

you cannot put the blame on all sellers, when you use a word "Never Buy" it really affect the whole QL Traders.

I have been selling in QL for nearly 3 years, so far I concern about customer satisfaction. I always offer 2 days return policy after sale.

as Just1s said, if you are really not sure the seller you can demand for 2 days return policy & a ID copy.

but in your case you have been very concerned about the price instead of seller's identification.

While buying this kind of stuff price is comparison is important but dont forget to count the seller's service & trust.