Partner, the value of these cues is based on the Wood that they were made from and there condition.
If they are made from Ebony or Purple Heart they are worth between $350 and $450 ea, all others are worth $200 to $350 if they are in good condition.
Good Condition is considered to no be wobble in the butt section from 900 thousands diameter to larger in diameter, the veneers and points are not chipped or broken and they are close to even, and the butt section of the cue is again from 900 thousands diameter to larger in diameter and has no major damage.
The cue shaft is not important for conversion, and small amounts of run out or wobble are acceptable for collectors.
Remember, the prices I have listed are based on what I would pay at my location, and these prices may be higher or lower other places.
Have a great Day, I hope this helps.
Manwon