£2K for a reasonable job seems spot on. I was £700 for the front and the read, excluding bumper. Paintwork is EXPENSIVE.
Damage repair is actually no really considered when quoting as it's taken car of quite easily, in comparison to a pain job.
My only advice is to haggle like hell, "I don't need a VAT receipt", "do you do homers?" etc. Another thing to remember is, if you're paying top dollar, expect excellent work. Don't let them away with anything you're not 100% happy with