4B Viper,
Sorry to hear about the accident. I am sure that you hate having your car in pieces. Aside from the normal posts that I do on this website, I happen to know where a fair amount of the other Sapphire Blue ACR's are in the country. You have a really rare car, as you know. While all Vipers have some rarity, the Sapphire Blue ACR's are especially rare and it is a shame to see 1 of the 28 originals have an accident.
To the best of my knowledge, I believe that there are two like cars in California, one in New Mexico, a couple in Texas, mine in New Jersey and one in Bahrain (no kidding). Despite the rarity, all cars, apart from their emotional value to the individual, have a monetary value. Without seeing your car, I cannot give you a totally 100 percent accurate opinion, but with the information that I have, as sad as it seems, I think that you have to total the car. The reasons are as follows:
If in your accident you damaged a couple of ACR wheels, they can be 3k per piece for perfect ones. More troublesome are the Dynamic Suspension shocks that retail, per piece, more than the wheels. As you may know, the hood is worth approximately 16k or there abouts. Totalling this all up, you may be at 30k for just parts.
Matters get worse sorry to say. Although I am sure that your mechanic is good, chances are that he/she has never worked on a complete rebuild of a Viper. The number that they gave you, 40k, is an estimate. That means it could come out lower, or higher (gulp). Lets say that it was a fairly accurate estimate and was off by only 10 percent. You are up to 44k. And that is if the person is extremely good at what they do.
Also, fixing the car, without the wheels or Dynamic Suspension shocks will affect the overall value of the car. I would not do it. If it is an ACR without the right components, it is not an ACR. Period. Might as well just put a sticker on the side of the car and call it a day.
If you run into unexpected damage, the value goes higher. If a part is hard to find, the troubles mount even more. Fixing the car, putting the car for sale, with full knowledge that the car has been in a serious accident, is fraud in some states if not disclosed. You don't want any part of that, or even to take the chance.
I would take the suggestion of some of the other members here who have had an "expert" value their car in order for you to get the most out of the car. That would be the cleanest way for you to minimize your economic damage. As for buying another Sapphire ACR, it may be a very long wait. You never know, but over 1/4 of the total production is spoken for. Many have been crashed, further limiting the number available.
Even though it pains me to say it as I am really partial to these particular cars, I think that you have to scratch one flattop and send her to Davey Jones locker. I am sure that you can get your value out of the car using the resources here.
Best of luck to you,
Patentlaw