price of 911sc with widebody

[ketchum951]

Hi I have question , I'm interstion in buying a 1980 sc the car is usa specification has 3.0 engine without a/c, car was repainta and updated body to 964 about 8 years ago by professional shop, all the paint and lines and flare still looking good, car has little drops of leak oil no sure where comming from interioir looks great dash perfect, and seat has been recover with leather looks great asking price 12k here are some pic sound like deal!or pass
how pricy will be to upgrade exhaust system in this type car to gain power!