Hammerli Questions

Good afternoon folks. Long time lurker and shooter with no post's. Plenty of positive feedback over on the FALFiles.
I have a few questions regarding a Hammerli International pistol I bought quite a few years back.
There are no other markings on the pistol other than the Hammerli International name/logo on the left hand side along with Lenzburg Switzerland. On the right hand side is the serial number.  It originally had a compensator on the muzzle along with a screw in cap. There is one broken arch on the compensator and I don't know what happened to the cap. It has the barrel weight which is drilled and tapped for a Larrys Guns optic mount, three magazines and both right and left hand grips. I believe the grips are Rink? 
I have not shot this pistol in years and am thinking about selling it. Any thoughts on what something like this is worth?  
I can post photos tomorrow or send them.

ThankPaul