I tried some massage coupon, which turned out to be a stupid shop, and both times I go there, they said they don't have the person who has to do the massage, there is no way to get a refund.
This site got some good reviews written all over internet about how to win at mad bid and all, many of the reviews tell you to enable auto bid. That is one sure way to loose all money. There is no guarantee that you win even with auto bid. There are many people constantly bidding. I nearly lost 300$ before I realise I cannot win. Stay away.