I have a 92 teg ls w/ 160k and it runs great plenty of power when i want it and a comfortable ride.
i belive that i have the same engine as the 90 teg, would a b18ca which puts out 139 hp and a red line of 6750. by the sound of the outside and 100k highway miles it sounds like an ok car, and the 1000 isn't a bad price but i would try to drop him a hundred or so. and know that if the body is in great condition when the engine does go that a complete swap of a another b series engine is a good possibility, b16a's for example, you can get the engine alone for around 600 or complete swap for alittle over a thou and it will have even more power and typically the engine will have under 35k, like new.