You even have to watch when you are a seller... we had a guy try to scam us when my husband sold a motor scooter on ebay. He had the winning bid, but wanted to do some crazy deal with the payment (pretty sure that had to do with a cashiers check too) and wanted us to ship the thing out of state. We'd specified Paypal and local pick up only on our auction, so we refused to honor his winning bid and turned him in.