1300 for an exterior respray ?
That just sounds SKETCH.
Check out his work, definitely ask about how he is going to spray it, leaving everything on the car is BOOTY and you will have problems later on with delamination from not getting everything prepped properly.
Does your car have any bodywork that needs to be fixed ? if so that is even more crazy cheap.
Just do your due diligence on the shop and the guy, ask what kind of materials he's using, removal and installation of things, if you can remove the stuff to make sure its prepped and sprayed correctly,turn around time etc etc.