6520 Colt Value Help ,now listed

I've had R6520 for about 25 years.. Other than being a GC14XXX serial number , not marked military/LE only ,I don't know a lot about its value.. It's unmolested ,a pre ban (for what's that worth)..I've searched a lot for a comparable sale ,on the usual sites..Can't find anything.. Any help tracking down sales or more info would be appreciated. It's time for it to go to someone who will use it