Howdy
If you have a lead on a COMPLETE Janus then write the check. This is the rarest of the scoremasters. I've only seen one and it sits in my safe now. I paid $1200 for mine and it was very used. The Janus was marketed at the IPSC folks and we normally are hard on guns. So many Janus's were used up or modified beyond being a Detonics. By Complete I mean it should have both barrels and spring sets with papers and case/box. It should say JANUS on the slide,it may have Bomar or Millet sights with 3-4 different front sights and then the misc little tools/goodies that came with every gun. If you don't want it share the info as there are many collectors who are looking for them!
Hope this helps...
L8r
Conley Janssen
USMC 87-93