I had a few successful sales so far. Seller are asked to set a reserved price. If the highest bid is higher than your reserved price, it will be accepted automatically. Seller doesn't have to sell if no bid is higher than the reserved price. I usually set my reserved price close to the appraisal value. If a bid is not higher than my reserved price but very close, I always accept it. There are some unreasonable bidders sometimes: for example I have a lot with appraisal value of over $1,000, I set the reserved price $800, and a buyer bid $80, of cause I rejected it without counteroffer, why bother! I just relist and patiently wait for a reasonable bid. Overall good experience.