I have had tons of Josswest cues and while I am bias, I think they are one of the most UNDER valued cues out there.
You failed to mention a lot of things that REALLY effect value. So I will state my assumptions.
1. It is all straight, and I do mean straight.
2. Since it has been refinished I would assume finish, wrap etc is 100% condition.
3. Assume that shaft is at least 12.75 mm (did I mention straight?). Bill made a lot of shafts at least 13 mm but it appears that a lot of guys hobbies were to sand them down. Remember these are probably 30+ years old and had lots of opportunity for "adjustments".
4. Only having one shaft hurts value a little, having two helps a little.
5. Veneered cues always sell better and have better value.
As is, I would list the cue at $750+.
Ken