I picked one of these with a black linen micarta handle up for $55 back when Blackjack was still in business. Its a great knife and has been down quite a few trails with me. The blade will stain easily. The first thing I did when I got mine was rub it down with lemon juice to get a nice oxide coating. Now the blade is the same color as an old carbon steel kitchen knife. I suspect that the first time you get blood on it the blade will stain. One of the modern miracle protectants might prevent the staining, but it really does not hurt anything, and gives the knife more character.
I oil mine down prior to storage, and store it in a nylon sheath rather than the leather one it came with. I use the leather one for carry. It has not rusted or pitted despite some heavy use.
The blade is easy to sharpen. I use crock sticks and dont worry too much about maintaining the convex edge. Its not as sharp as when it came from the factory, but its still plenty sharp. The interior of the leather sheath is sliced up a bit because the initial factory edge was so sharp it would slice parts off the sheath when I sheathed it.