Hi guys,just picked up a Ruger Mark II goverment Target model 22 lr Cat # mk-678G 6 7/8 Bull Bbl in orignal yellow and black cardboard box. Both orignal clips,and test target and all paperwork. Two set of grips ,1st is walnut panels with thumb rest with the ruger silver crest with black back ground,2nd set is black plastic with the same crest.the gun is 98%. or better. What do you think it is worth ? Is this the collectors model ?