I bought one of these on eBay last week. It was new open box and I paid about half of what they normally cost.

http://www.jancy.com/en_us/jhm-series/jhm-usa-5-06/

I have worn out 2 Jancy Sluggers in the last 30 years and have one that is getting a little weak. Fein, which is the top name in Germany, bought out Jancy a few years ago. The motor part of it is Fein and appears to be better quality than Jancy ever was. These things are amazing as how they drill holes in heat treated truck frames.