Right now there are a couple of Strider Gen 2 SNGs floating around Ebay at under $200. But the current SNG version is Gen 6. But the MARSOC SMF version is only Gen 2 (I know idfferent knife, but pretty close). WTF is the difference? And with new SNGs going for $400, are these Gen 2s a good deal (Though obviously they will go higher.)?