I got my OD one w/root saw from LoneWolfDist.com I think.
They're a great knife for the money but they don't have a very good edge on them from the factory. I used my Lansky clamp knife sharpening system to reprofile each side to 20 degrees, then worked progressively down to the fine grit stone. After some stropping on cardboard, I can shave with it.
They're carbon steel, not stainless, so you have to keep them oiled to keep the edge and protect from rust. If you use it to cut food, food grade silicone is a decent rust preventative.
I got mine from budgunshop.com it was 35 bucks or so I got the serrated back one they had limited quanities the glock store has them as well i beleve its a great knife for the price much cheaper than my M9 bayonet but its carbon steel but it will do the job