I looked on an auction site and saw a few USR aug's listed as unfilred, nib going for about 1500. Does this make sence? I mean I don't actually own an aug, but if I knew you could get a NIB one for only 1500 I'd have saved up for it. I always thought a used would be 3000 to 4000. Sounds fishy, but then again maybe I need to do more research. Any thoughts from the pro's?