The retailer Centsible is the worst seller I have ever experienced on ebay. They actually hold buyers to ransom by refusing to give you postage costs. I once bought a bundle of c64 disks from them, I sent several emails asking for the total cost and receieved emails saying "I don't know...shall I tell you , or not?"
This is frankly incredible. They eventually told me that as I had low feedback [as a new user] they didnt give a monkeys whether I paid or not as they would leave neg feedback and get me kicked off.