Yes. I am liking these ideas.Well I’d ask for a list of the bad and good... any documented mechanical work if available. As others have stated see if the timing chains/belts whatever that car has were done as of recent.
You keep saying it’s a “5 speed-manual” how is the clutch and transmission? it could be a sloppy pig with worn synchros.
if the car is mechanically worth it I would offer $950. You can always go to an unbiased shop down there in Brooklyn offer the $950 have the seller pay a shop to give the car a once over and add the shop fee to the $950.
if the seller has nothing to hide he should be fine with bringing the car to a shop he doesn’t use... knowing he’s got a vehicle that would pass inspection and you would reimburse him in the sale price of the vehicle.
I'll check local listing for other manuals but this one I like as its another Subie.
I should look at it with skepticism.