I had an '86.
If you can't find one that is solid, with all the SVO specific parts intact (hood, wheels, shifter, steering wheel, intercooler, etc.), you might want to be careful.
It's cheaper to buy a solid, original car than to buy one that needs a light restoration.
The 2.3 is pretty durable, and as all turbo cars, they respond well to mods. They had some pretty neat things at the time...4-wheel disc brakes, octane specific boost controller, Hurst shifter, turbo/intercooled.
I'd guess a solid, original example in nice shape would fetch ~$5-7k. More $$$ would get you a nicer car.
Later.
S.