for sale is a used kryponite evolution high security u-lock in with very little use. These normally sell new for $70 or more.
http://www.amazon.com/Kryptonite-Evolution-Bicycle-Bracket-11-5-Inch/dp/B001ASWIZ6
-14mm hardened MAX-Performance steel shackle resists bolt cutters and leverage attacks
-Hardened double deadbolt design gives additional protection against twist attacks
-High security disc-style cylinder
-Protective vinyl coating
-Sliding dustcover protects and extends cylinder life
-3 stainless steel keys -- one lighted with high intensity LED bulb & replaceable battery
-dimensions: 4" x 11.5" (10.2cm x 29.2cm)
-weight: 4.10 lbs (1.86 kgs)