Lots seem to criticise using Ebay so here's a contrary view. Since it's said people are quicker to complain than praise.
Bought a computer midi tower case and PS from an (unknown to me) supplier at a good price. It arrived damaged - the front plastic panel was broken off due to it being dropped. The bottom of the steel frame was slightly dented too.
Contacted the supplier and sent some pics of the damage as requested. Two days later got a full refund via Paypal. Not required to send the old unit back. So I've got a free PS, and a case which I could repair invisibly if needed