Jerry,
Appreciate the info. I check Ebay now and then and seem to lose out on the cheaper ones, but also as mentioned above, a lot of used ones need to be Re-Calibrated. The Re-Calibration Tool alone is about $100. Seems like minimum investment would be about $200, with the shipping and all. They also sell a Rebuild Kit, which is about another $35 or $40.
If my idea works, my investment will be about $15.
Bill