Salvage title = run, don't walk, away as fast as you can. Salvage always means (a) the cost to fix is worth more than the car or (b) damage is so bad car cannot be fixed properly.
I bought a car via e-mail once, but it was a CPO from a BMW dealer about 6 hours away. $500 deposit. Dealer was willing to extend the 3-day return from the day it arrived at my house. I ended up flying out., picking it up, and driving back. LOVED the car.