I bought my first Crosslock when they first came out. Green insert, single blade, partially serrated. I carried it for years, and lost it eating lunch on a logging job. I walked back through that job a dozen times and never found it. Of course, by this time they had been discontinued.
A year later, a local shop was going out of business, and were selling all of their knives cheap. All of the nicer Bucks were gone, but they had two of those same green Crosslocks still in the boxes! I bought them both of course. After carrying one around for a year or two, it disappeared one day. I had in in the morning, but by evening it was no longer clipped to my pocket. I didn't open the second box, hoping I might find the knife, and sure enough, almost a year later, I found it in the mud under some leaves in my garden. After washing it off, the green inserts now have black camo stains, and the blade itself has two or three surface rust spots (tiny rings). Other than that, it was perfect. At least until I was using it on a ladder and dropped it onto a slate floor. The result was about 1/16" of the tip snapped off at an angle. I haven't decided, but I think I'll take a dremel to it and smooth off the chip.
This is a great knife with amazing steel. Takes an edge and holds it seemingly forever. Glad I still have one in a box in case this one ever dies. Of course, given what I've done to it (leaving it in the mud and sun and snow for a year, dropping it on slate, cutting sheet rock in an emergency), a lesser knife would have died long ago.