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.
It takes a while to get a hold of customer service using the "Live Agent" feature. Only English is accepted. (I tried typing in Japanese and got no response?... which is strange.) They respond better if they e-mail you first and you reply, than if you initiate the conversation.
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.