I just got one yesterday, as part payment for a wheelset I built. Probably about $40. I love this bike, and intend to ride the crap out of it. The brakes aren't very good, and here is my solution:
I have a Sturmey Archer S3C tricoaster hub-- three speeds, like the AW thats on the bike, but with a coaster brake. I am going to lace the tricoaster onto my existing wheel-- I will have both rod brakes, and a coaster brake. It will not change anything about the appearance of the bike, ecxept for the torque arm on the hub.