its not only the repaint.
the engine is swapped. and the swapped engine has internals swapped and the head has been ustaadified.
the problem with repaint is that there is no real reason why someone would repaint a car except when its completely totaled.
yeah, no other car has oem pistons and rods or gasket...right? they run without these parts.
and the heads turn cuz the car makes a loud pprrraaaaaaaaaaaa sound.
780k maybe reasonable, but you'll get very low offers with this condition. try to get everything back to stock.
and where's the 800k offer you got?