Unfortunately, hot airs do not command the prices 86/87's do. Add to the fact yours needs paint and interior, that lowers the price significantly. If I were to guess, I would say around $2,500 at best.
Yea it needs alot i was trying to sell it to soneone that will do something with it, but for that much? No. Gangsters want to buy it all day for 5k but they will put big rims rediculus sound and so on... wouldnt mine if they will pay that much
NADA classic car value guide lists low retail value at $5975. The condition of your GN may be a bit below what they consider for low retail so take that into consideration. Plus, as has been mentioned, the hot air cars are Rodney Dangerfield editions garnering No Respect. A shame too because the '84 is rare as hen's teeth and has the coolest interior put in these things.