Another thing to watch out for on eBay: there are a lot of "oddball" PowerLocks out there that are missing the 1/4" adapter and the scissors. Three guesses how I found THAT out...
I've heard rumors that these were made for some strange military contract that didn't specifically require those implements, so SOG left them off to save a few bucks. On the plus side, they have both a plain-edge clip-point knife blade (rather than the standard half-serrated), *and* a separate serrated sheepsfoot blade... along with three nylon spacers where the 1/4" adapter and scissors should be.