Dont worry about postage cost. As long it said £15 in the auction when they bought it then they were happy to pay it. Anything else is a no-brainer
You'd think so wouldn't you? But he/she is still going on about it, and has said that if I don't refund him £7.50 they'll take it to eBay. Which doesn't bother me, we've already spoken to them and as mentioned above they said as it was clearly displayed on the listing we don't have to pay anything back.
As I've just pointed out in my final direct response (not communicating any further with him/her), we advertised it as £15 for First Class Recorded Delivery. We sent it First Class Recorded Delivery. They said in their first message the camera was as described, therefore they got the product and service exactly as advertised. By placing the winning bid and subsequently paying for the item they have accepted all charges.
I also (possibly wrongly) pointed out that the camera didn't go and get the box from the attic itself (almost breaking its arm (if it had one) in the process) (I didn't mention that bit), it didn't wrap itself in bubble wrap and climb into a box, the box didn't wrap itself in a plastic protective bag, or write and stick a label on it, and neither did it take itself off to the post office. All of this is part of the postage and packing process, and takes time.
I'm now awaiting their next response.
It doesn't bother me, I can argue it all day with them, and although its only £7.50 I refuse to give them the refund, especially taking into account the low price they paid for the camera. And besides, how many times do you see something advertised online, for example on Amazon, where an item is priced at a ridiculously low price (for example an SD card at 28p), but postage is around £5+? Do people like this complainant really think they are making less than 28p in profit? No, they'll send it first (possibly even second) class in a normal envelope at a maximum cost of about 60p. I wonder if they'd complain to them as well and ask for their money back?