The greatest deal I ever got was my first Khukri. Its an 18" WWII model from Himalayan Imports. It was $69.00, which was an incredible deal for such a fine piece of handmade forged goodness. The best part of the deal, though, was being introduced to the late Bill Martino and getting to know a bunch of the folks over at the HI forum, including Dan Koster, who did some custom work on an HI Bowie for me.
The best from a money perspective was probably a Ka-Bar black shorty for $13.00 which was a typo from the company, but they honored their deal (I knew it was a heck of a price when I ordered it, but did not realize it was a typo at the time).