I get that the car is already gone to someone else, but for what its worth, my formula or logic, for lack of a better term, when deciding whether to buy a salvaged car is to ask myself what is the best version of the car I am looking for that is available to me? If the only 2017 ACR you can get is a wrecked one, then it makes sense to restore it. If there's at least one other that's not wrecked and available, then you go for that one. If you buy a salvaged car that is so rare and hard to find one not in salvaged condition, it will already have crazy stupid values. Think about a wrecked 1950s Gullwing Mercedes 350SL, or Ferrari 250 GTO from the early 60s, etc. Those will be worth millions, salvaged or original. True a salvaged one will still be worth less, but no one will look down on it as a result given its rarity. I see ACRs for sale on eBay, Craigslist, and FaceBook Market Place all the time.
On a separate but related note, if you ever buy a car like this, I agree that whomever does this kind of work to restore it should be a serious pro with experience. It also may help for value to have a documented commercial builder restore it when trying to explain the car's provenance, especially decades down the line.