Yes it is customary to charge for "footwork."
However, they are now one owner generation older. Additionally, they have incurred wear and tear from another move, repositioning probably took its toll and playing it through your inferior equipment didn't do them any good. ;-O
Geez...I better stop befoe you have to pay me to take them off your hands!
befoe ? you from Oklahoma
I live in the Sooner state and take offense at that. The word we would use is fixing, as in 'Before too much longer you will be fixing to pay me to take them off your hands'.
Please don't insult us Okies, it is bad enough we have to put up with Texans.