bought a 91 with 150K on it for 100.00 drove till it had close to 250K on it. Never any major engine problems (2.5 four cyl) transmission worked as good the day i scraped it as it did new.
Worst problems i had was replacing steering rack, and the regular rear brake parts. Sold it for scrap for 100.00 bought a wrecked 93 Grand Prix for 50.00 for the engine, put the engine in a real nice condition 89 Z24 Cavilear that i got in a a trade and have no $ in. passing 160K on the car and 70K on the new engine, we will see how long this one lasts, that is if i dont swap the 3.1 out for a 3.4. So all in all, i have nothing in the Z, the old Lumina paid for it.