Ancient
The Apple salesmuppet SHOULD have pointed this price list out to you
Apple - Support - iPod - Repair pricing Scroll down for UK prices
However there are a number of third party companies around the UK who can repair them cheaper - though I have to say now that I've never used any of them.
It seems that somehow these guys can get spare circuit boards etc out of China through the back door - presumably either from Foxconn, or from Foxconns suppliers. Often the parts turn up on AliBaba - though you'd have to buy a lot of parts!