Powertap SL Wired Velocity A23 rim

I'm selling my Powertap SL wheel. It's a wired hub, laced by 28 double-butted spokes to a Velocity A23 rim. This is the hub with carbon "windows" and a black end cap; the hub weighs approx. 425 grams. Wheel was built this past spring and has seen 3000-4000 miles of road use, but would definitely be tough enough to survive a 'cross race or two. Includes wheel, computer, two wiring harnesses with cadence sensors, usb download cradle, hub tool, and hr strap. Asking $500+shipping.