Here's what consumers have asked with answers from Buyee staff and previous consumers.
I was able to find a plush I'd been seeking for months on Yahoo Auctions and, since Buyee has an automated bidding system, I was able to win it for the buyout price then and there instead of waiting for someone else to process my order!
Its much easier to process bids/orders myself than it is to wait hours for someone else to do it when my item may be purchased by another buyer in the meantime.
Zen market is way cheaper than Buyee. Buyee has too many hidden fees and they're service is trash. They won't give you refunds if your package is lost.