TAC and Title Issues
The seller added that "there is a CoA sticker with matching number 278 on the underside of the car." I assume he/she means the TAC sticker. But I did not know that TAC stickers were ever placed on "the underside of the car". The color of the car has changed since the TAC inspection. Was the original TAC sticker masked off and the paint was applied around it? One has to ask what happened to the original VIN plate since the car had been TAC inspected. California, which installed the current VIN plate, issues a SALVAGE title to a car that has been declared a total loss, so that every subsequent buyer knows what they are getting. Not all other states do so. One way to get the word SALVAGE to go away from the title is to register it in a different state (or sell it to someone in a different state). I have no way of telling if that was the situation in this case, but it just raises another caution flag.
Were I considering this car, I would probably pay for another TAC inspection before paying the money for it. Requiring a successful passing of a TAC inspection could be made part of an offer to "BUY IT NOW". I don't see how a reputable dealer would object to that, just like you might want to get a rare painting authenticated before you pay for it.