minor accident with 90 lumina scratched 1 panel knocked off drivers side mirror on 1990 Chevrolet Lumina

What is approx value of this vehicle (poor appearance, junk yard replaced doors, previously busted tail light)? I need to make a cash offer for repairs (which i feel will not be do except maybe mirror) but I want to be fair.

Asked by for the 1990 Chevrolet Lumina
300.00 if your lucky