Can any of you Surefire experts tell me what the value of a used Surefire 6R (rechargable) which converts into a 6PX (two lithium), is (circa 1992). It still has the working, original R60 lamp. It is in very good condition. Please note that I tried and tried to do a search before I started a new thread just to get some information for myself, but I can't search for "6R" or "6PX" as they are too short of terms. I appreciate any help. Thanks.!!!!