I have a 72 cutlass convertible but it needs restoration, so, it's pretty worthless right now, but still rare.
I also own a 1992 Camaro, not rare in general, but mine's a B4C = Police Package. Was a special order, w/ mostly the 1LE (Racing Components) + A/C. There are a few minor differences. That year there were only 589 made. Mine was never used in service, so, no light bars or anything added. Honestly, I doubt it'll ever be worth much as a rare vehicle, but, maybe I'll get lucky and some collector will pay a handsome price for it someday. In the meantime I get to enjoy driving it to church on Sundays, 1/4 mile at a time.