MK enterprise would only qualify as traders, they prices are higher than local hongkong wholesale rates you could receive from some of the traders/semi-wholesalers that have shops in hongkong, they sell 1 pc locally, but this might be only cause i deal in mobilephones and came on to salehoo cause i was gonna start a e-store, the prices from your chinese suppliers are over what the market RETAIL price in shenzen is for the products they supply,
while your directory might be good for americans looking for semi-wholesalers and dropshippers, its pretty useless for someone that has access to or has been to china,
a piece of advice, check all suppliers from china, even though they might seem like genuine suppliers, they products might be of sub-standard quality.