We are selling a large item on a well known auction site for someone as a favour....the value has risen quite high. After the bidding started I said when it finishes and we get paid I will give you the money less the fees the site charge...they said 'oh well I did not think you were going to charge us'.....we are not, just passing on fees, we are not attempting to make any money out of this. They have become rather sniffy about it AIBU?