To the best of my knowledge Paul Heubler is a retired cuemaker from Missouri. I have played with several of his cues and was happy with the preformance of every one. I saw more of his cues floating around during the 80's than recent times but there are several still out there. I wouldn't begin to know the value of your particular cue but if I had to guess I would put it around $100.00 - $150.00, BUT I could be way off base.
Hope that helps,
Chris
PS. I am sure there is someone here more qualified that could give you accurate info.