What to look for? Going to see 1990 Subaru wagon

So I have been watching the asking price on this drop over the past few weeks:

https://columbusga.craigslist.org/cto/d/1990-4wd-subaru-wagon-5spd/6295926652.html

A 1990 Subaru Legacy wagon, running/driving condition.  It has been listed (I think) several times, with the price decreased incrementally, to the point that the seller has indicated to me he would barter for something I have been trying to move out of the house anyway.  

So the question is -- would you rock this essentially for free?  Intended use -- to finally attend a Rallycross, and do so in a vehicle that I don't care about.  I have never had a Subaru, and would like to explore the rabbit hole of Fuji Heavy Industries and the Pleiades.  

What do I look out for?  If you had a little bit of $$$ (challenge budget) to spruce it up for rallycross, what would you do?   My cursory GRM search reveals that the EJ22 is pretty dependable, and that the 5 speed box is ok (auto not so much).  Seller's pictures reveal a relatively preserved, clean interior.  I'm likely on my way to see it and deal tomorrow.  Thanks in advance.  

Look for rust. I would rock that but they have all disappeared up here. 

RUST, rear wheel wheels up to the shock towers and the fuel filler neck.  Make sure the clutch works.  Other 28 year old car stuff.

Rust rust rust rust and rust. I daily drove one for a good while and loved it! 

 Make sure the all-wheel-drive works. Check this on the asphalt and check this in Gravel. Everything on this car is fairly robust in the drivetrain. However, neglect usually takes these out as everything is mechanically operated in the all-wheel-drive system

If it's not rusty, jump on that.

Skid plate and a set of snow tires - then off to the rally-X with ya!