I have bought some jeans that don't seem the real mcCoy (everything about them seems 'wrong' - the labelling etc) and the size is completely wrong for me, which is odd because whenever I buy that brand in 'my size' it works. Everytime. The seller has immediately agreed to take them back, though not agreeing that they're 'fake' (which isn't important anyway). She has requested I return them by recorded post. Who should pay this postage?