I almost bought this, the brother of the SC. A 78 Aspen R/T. It needed alot of work, and wasn't worth the 1500 he was asking.
Actually, if all the flares were intact, then it was probably JUST worth the $1500 since it also has the three piece deck spoiler and louvers. Full flare packages, three peice spoilers, and complete, intact, good condition grills are worth a pretty fair amount these days. Wheel flare sets will go for $1000, 3 pc spoilers up to $300 and grills are up to $200 or so. Single peice spoilers are more common and only get around $100. Disc brakes are worth a few hundred, tuff wheels, if equiped are another hundred or so, but that's about it for valuable parts unless you also have an E58 engine. Parting out an F body is a dicey proposition at best.
Last fall I sold my drag car, an 80 Aspen with a 76 front clip. I got $2000 for it without the engine and trans, which is exactly what all the used race parts were worth if I parted it out, so he basically got a completely rust free body for free.