Picked up a USN MK 3 MOD 0 yesterday at a pawn shop for $25.00. Has plastic sheath, but no box, shoe string lanyards or belt clip. Has not been sharpened and only wear is on the blade from sliding in and out of the sheath. Grips are LNIB.Pommel has lost some of its dark coloring, but otherwise, knife appears to be in perfect condition. Would like to learn a little about this particular knife model and how did I do on the $25.00 price? Basically collect the Shark family of Case knifes and some auto Protec's, but this just got my attention for $25. and couldn't leave the shop without it. Hope to hear from some of the experts on this site.