Demand diminished value money. Their insurance company will deny it up and down but if you are serious and threaten legal action (and are willing to go to small claims court), they will pay up right away if you have proof in the form up multiple appraisals. You can get those from your local dealer, KBB (same car with and without accident damage), and places like
http://www.diminishedvalueassessment.com or
http://www.autoloss.com/.
Went through this a couple years ago and got almost $6,000 from the person's insurance that hit me (Farmers). Our car was just a few days off the lot.
Diminished value is real, there is legal precedent for it in every single state, and should be part of the claim process. The loss is now (time of accident), not when its time to sell the car because the value of the car goes down immediately.
The accident WILL show up on the Carfax (car's credit record basically) and will result in you loosing money come trade-in time or they may even refuse to accept the trade-in. Even with a private party sale the Carfax history will result in lower values. Carfax is a permanent record so even if you keep the car 10 years you will have a loss.
Insurance companies all hope you've never heard of it and/or aren't willing to pursue it. They will insist up and down that it doesn't exist but will immediately pay up when presented with a serious claim. Some states even require it be part of the claim by law.