A full respray would be very expensive,i.e. seats,carpets,engine etc out then prepped and sprayed.£2000-2500 would be a reasonable price.If on the other hand you mean just the exterior of the car then £1500 would be a reasonable cost,any less then i would think twice about using them as they would probably cut corners,you then have a nice respray for 6 months then you end up with what my car looks like now after a cheap job,laquer peeling paint not flatted properly,overspray etc.Get some examples of their work before commiting to anything. ;)