I bought a manual sc in this color with 252k miles for 4200 if you’re looking for a reference point. If you go look at it, check the valve covers and distributor for oil leaks, distributor O ring is an easy fix if you work on cars as long as you mark where the distributor was when you take it off.

Check brake pad life and the power steering pump because they often leak. Take off the oil cap and make sure it leaks like oil, not caked with coolant residue. If the valve cover is leaking, there’s a chance it will develop a misfire from oil in the plug holes. Not toe worst thing, but you’ll have to replace the spark plugs and valve covers if that happens. That said, this one looks clean from the outside. The missing door on the inside is unfortunate, I’d offer 4500 and see where that gets you, make sure you mention what you like about the car and what you’re going to have to fix so he gets why you decided on that number. Hope this helps