I bought one from armygear.net and was pleantly suprised. It was brand new, still in that CIF plastic cover. It was as if some quartermaster/civilan contractor ripped them down off the shelves to make way for the MOLLE. Same for the frame, and strapes. The only thing that looked mildly used was the kidney pad.
And the price was under forty buxs. Not sure now though as that was awhile ago.