There are a couple of good ways to get a number to expect for "diminished value". Since when my DH was hit after only two weeks. we went back to the dealer and had the salesman give us trade in values of our car - one estimate if it was undamaged and one estimate considering the damage when fixed. As a side note, the salesman is someone my DH has dealt with for nearly 20 years, and he knows that when we need a car my DH always comes back (my hubby is Toyota loyal). As a matter of fact, he is always prepared to give my DH the lowest possible price on a car because he knows how my DH dickers! So this sales guy knows he doesn't have to inflate value estimates for this case to keep us as a customer. So we trust the values he gave us regarding the Camry's values.
We also used Kelly blue book -
www.kbb.com - and ran some numbers on their site with both undamaged and damaged scenarios. Taking both our dealer's estimates as well as KBB, we determined we lost $2500 in the value of the car due to the damage. So we had it documented. Even with that, we had to dicker for 7 months with Progressive just to get them to pay $1750. But we felt that was all we could get out of them and settled, and they had the gall to say we should feel lucky because they rarely pay diminished value. The thing that really stuck in our craw was the fact when the car was hit, it still had the dealer tags on!!
The dealer did a great job repairing our Camry, and I was pretty happy with it. My DH on the other hand, knew the dealer did the best job possible, but since he had done body work years ago he was able to see all the places were the paint was blended etc. - I guess all the things an experienced body shop person could see. To the layman's eye like mine it looked great.
So don't just settle if you feel you aren't being treated fairly. You didn't asked to be hit in the ass end! You deserve to have it restored as much as possible to pre-accident condition. If you have a good Toyota dealer that does good body work, that is the first place to check. At least there you know they use real Toyota parts! Don't take it where they are pushing you to - probably done with sub-standard parts. You want the best.
Best of luck, and keep us posted on how it turns out.
Cheryl