H & R's - fitting costs.

Gonna be buying some H & R springs shortly.

As a rough guesstimate, how much would I expect to pay to have these fitted?
 
Rears are really easy, could save yourself some money if you did them yourself.

Fronts are more frustrating and require the correct tools. Definitely get the garage/mate to do it. £140 is what I was quoted from a garage, £65 and a couple favours to a mate.