This crowd are also cheap, bridgestone front BT21's for £66!
http://www.mytyres.co.uk/cgi-bin/rshop.p...&s_p=Tyres
Probably paying much the same price for tyres as a small business does so you're eating into their profit.
I know a bike shop in my area charges a little over £20 to fit a provided tyre on a free wheel.
Suppose they've got to expect customers hunting out the best deals these days?
Treat everything in life the way a dog would- if you can't eat it or foc it, forget it.