I know about the fees being refunded its about loosing geniune buyers because someone else who is NOT over bids them and never paid. Offering a second chance can be missed because customers may have already gone somewhere else.

So its really about loosing good customers because of time wasters.

Oh here is one I got today.... I had a customer bid on two of my items which where the same and WON BOTH. Then tells me she only wants one and paid for the cheaper one with the lower bid price so I had to cancel the other payment. 

Thats why we need a strict policy in place from ebay that once a bid is placed the buy agrees to pay or is charged a fee for non-payment.