"I avoid the GEMMS, Musicstack and the likes, over-priced, badly described and no way to get refunded (the mark of a good seller)".
What an astonishing statement. The purpose of these sites is to allow access to a significant number of sellers with a single search. Why would they be more badly described than anywhere else? Gemm makes more guarantees than any other seller I've ever dealt with. Pricing is always going to be subjective, but how can you believe that eveything on these sites is overpriced?