I've had many moments over the years at gun shows and stores...One I keep bringing up is one of the old Saxet shows at the George R. Brown Convention Center in Houston in the early 90's...I always like visiting the single-table vendors who seem to have cleaned out their gun rooms and closets, and just piled everything on one table to get rid of it...One guy I had never seen before or since didn't even use a table cover, just had all his loose ammo, magazines, holsters, grips, knives and assorted paraphernalia laid out on the tabletop...
After asking if I could pick up a few items, and sorting through them I picked up an all steel folding lockback knife, the likes of which I had never seen before or since...It appears to be constructed of four pieces of machined steel, and assembled with all interference fit pins, the hinge pin being round on one end and pentagonal on the other...Whatever finish it originally had is long gone, but I've never seen a speck of rust on it...
I asked the old fellow how much he wanted for it and he said, "Oh, gimme seven bucks"...I whipped out the necessary cash and walked away with it...For the last 30 years I've shown it to knife vendors who say they've never seen one before...Of course they all want to buy it, I've even turned down a few hundred dollars for it because I can't replace it...
Mine is shown below in an old photo, but I have seen pictures of the identical knife on a site called Worthpoint, which won't let me see what it sold for unless I sign up on the site, something I'm unwilling to do on a foreign site...I used to think it was a one of a kind handmade knife by some machinist in his spare time, but the letters IAN are in the identical position on the knife I found in the above mentioned Brazilian site...
I'll keep browsing tables for its mate although I don't think I'll ever find another, it's the thrill of the hunt for me...

...Ben