Look at the premises of the places the insurance companies use, state of the art facilities with all the latest tech. They make it easy for the insurance companies to use their services and tend to go for replacing panels more so than repair them because it's a much quicker job with better guarantees of success.Couple of things here jump out,
There should not be a difference of €2k verses insurance repair to private repair on a 3 dent vehicle damage. That’s very questionable to be honest. I wonder was the €1100 repair a cash incentive price?
The backstreet places will look very different, but will be a lot cheaper.