Dom
You are the typical british shopper.
"anyone actually looks, they'll wonder how anybody can charge £30 for a reg service..."
I have my own computer business, and we get people like you in every day, its not the building of the computer that is hard (my daughter is nearly 3 months old and has built her first
 
, its the time taken and the knowledge over heads.vat, tax ,insurance...........
It may be three "o" rings and a nut, do you know how much it costs for an ultrasonic cleaner ? testing panell, ETC.
Stop moaning and leave it to the experts
Simon
)