I'm new to this forum,but I've been collecting knives (including MIL-K 818's) for a long time,and although this is an old thread,here's my 2 cents: All of the USN,USAF and USMC MIL-Ks made by Camillus were non-issue, commercial offerings.This would seem to bring the price down to knowledgeable military collectors.On the other hand,those made were in comparatively small numbers, making them much rarer in numbers than any US marked ones. How this affects the market one way or the other probably changes constantly, possibly based largely on lack of information and basic desire. Just food for thought...