Theres some small holes around back glass surround. Other than that car appears solid. Hard to make good assessment with all the stuff around and on it. Garage is damp but not wet. Car came out of N.C. back in the 90s. Been in WV in this garage since. No original drivetrain really bothers me. Without a good build sheet seems to me its just another Malibu in need of a lot of attention. I have worse projects and am not worried about doing any of the work but dont want to give too much for it.
The vin was on the upper right corner.....it's gone. I think that's an Atlanta build sheet, you might find more buildsheets in that car in the typical spots.
The body number is in box 8 and that should correspond to the body number on the trim tag under the hood. I can't make it out in the photo, maybe you can.
Box 35 shows DG which is the code for the air cleaner that came on the SS Cowl Induction hood.
I see 1 SS grill, 1 green Malibu grill/non SS and 1 other grill in the mix near the trunk.
The column on an SS and non SS with black interior would have a black column. The picture is too fuzzy to see if that's an original dash, but that dash was available as an option on a non SS malibu or as standard on an SS.
See if the car has a 12 bolt rearend, rear sway bar rear a arm to frame connectors, front disc brakes, boxed rear trailing arms....all would be on an SS.
5 grand as other have said would be about right. Possibly more if the parts were cataloged and in good reusable shape.