"I hope this is a learning experience that you need to look at all the pictures, read and 're-re ... " (more)ad the headings plus read every explanation of the product before you bid. Not every bidder will be so kind sobidders remorse on 99.9% of the auction. THINK BEFORE YOU ACT. "
"Thank you, but just wanting to advise you on packaging your coin to go in the mail. Just don't ... " (more)use tape. Put them in a small envelope all folded up and put it inside the main envelope. "