Car with any problem means low value to many.
Just you saying "Has a slight miss at idle." Can mean just iffy plugs/wire or early sign of very large problems.
A bit "hard to start" could be normal.
87 duke uses DIS and DIS module is a bit slow to wake up after shutdown a few hours.
Try to start a second or two, stop, try again. If normal, usually start second time and quickly.But...
Long crank time could be iffy fuel pump relay. FP will run when backup switch in oil pressure sender get enough pressure to close FP switch. Carefully listen for FP sound when key is turned on. FP should turn on ~2 sec the off when key is on but you don't start the engine.
Look for fuel leaks on the TBI. The regulator diaphragm likes to leak a little when old.
See my Cave, 700 TBI
and 700 TBI diagram
part 70. If bad, need a rebuild kit.
If the car have been modified in any way... could be harder to sell. Many people do not want the headaches many mod cars have. Example: Many won't touch a lowered car because so many problems... many are major hack jobs that will break, often on the highway w/o warning.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave