Racing Champions was actually bought out but another company (I believe whomever owns Johnny Lighning now) and have been releasing new cars. They have out out a few Gbodies recently too.Not a huge scale car value guy but I deal a lot with farm & construction models from Ertl of the same vintage.
Out of box, light dust in nice shape, $15-$50 each. Depending on what's out of production and if someone has a collection that's missing 1 or 2.
Ertl/Racing Champions hasn't made a car model for 10-15+ years.