Will, for the average car there is a "standard" repair estimating guide; a 2009 lexus with a front left accident is a standard fee, they just input it in the computer add details to cover the level/extend of the damage and they get a number. The body shops are acredited with various insurance companies, so they might not tell you to go to such and such's but will reccomend you go to an acredited shop. The acredited shops will do the job for the stated price but then may also call the adjustor to "add" unforseen items or labour.
Surprise for them is going to be you car is not in the database. All parts have to be researched manually or hand made,(don't know if Johnny Woods or Wilkinson's have rear panels) so I doubt he will be able to give an good accurate reliable number on his visit. Get your own estimates from shops you trust if 1st 2 are within 10% good otherwise get a 3rd.
deniscCaretaker of 8MA1244 '70 Euro Mangusta DRIVE THEM, THEY WERE MEANT TO BE DRIVEN, IF YOU WANT TO LOOK AT ONE, BUY A POSTER!