Buy the bag. It's a cool bag. But you might need to love on it a little bit. I'm 6'3 and the bag fits my torso perfectly. Might be a little long for my friends with lower centers of mass.
I bought mine in the "good" condition category. The bag is perfectly fine but smelled like surplus (go figure) and it needed some elbow grease. Everything on the bag works. It has all its zippers, buckles and mine even came with some extra features. The Dutchman who had this bag before me had the compression straps on the side perfectly dingleberry'd so I didn't have to do it myself.
Now for the elbow grease. The PU coating on the inside of the bag was FUBAR. The inside was covered in sticky, stinky, little granules of the coating. I went out, bought a stiff brush and some flex seal, and got to work. I flipped it inside out and took about an hour to brush most of the coating off (pic 1 is about 5 min of work). From there I stuffed it, taped it off, and gave it a light coat of flex seal (pic 2). I'm currently waiting for the flex seal to fully cure but this bag now has a whole second life to live.
If I can edit this later I'll put in a picture of it on me for scale and a picture of the exterior.