Eric, this has been discussed here before (probably when it was last listed). I believe you commented on it.
An interesting design, in that it used skin conductivity as the 'on' switch. I don't recall if its provenance was ever proven, but there were a lot of odd modifications/attachments to all kinds of Third Reich weapons.
I've seen it (or its twins) listed on several sites over the last 10 - 12 years. Perhaps someone else can recall what it last sold for (if it sold at all).
Here's one thread I found in a quick & dirty search -
http://forum.lugerforum.com/showthread.php?t=28940
Glock30 wrote that it sold for $184,000...