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.