I think the value really depends on who's looking for what at the time and how quickly you want to sell the car. I sold a a fresh 3800SC swap with 1,200 miles on a rebuilt motor, a upgraded cam, injectors, a new Spec 3+ clutch, Power Log, Modular Pulley, custom exhaust, Grand AM brake upgrades, 17" wheels, and a bit more for about $4,000. If you can hold onto it for a bit I'd say you'll have more luck not selling it on a Fiero based website, where people really know values. Maybe Craigslist.