I got the £3000 figure from a guy who’s a fitter for a local Merc dealership, he seemed genuine and not prone to exaggeration.
Royal Mail tried to claim £1000 from my former employer for a bog-standard offside mirror when one of the guys had a little scrape with one of their guys, they settled for £500 apparently, which was still a lot more than a replacement mirror from the likes of Fleet Factors.