cheers, I have been doing that. So far I've found one guy and they went for £1.75 + £10.99 postage. I wasn't so pleased with the postage price, but I missed the auction anyway.
I emailed the seller and asked where he got them from originally and he replied telling me he's got another pair and wants £25 for them. I've declined as if he sold them at auction I would get them cheaper...