I've got a very, very slightly used Rutland 503 Windcharger and regulator. It was installed February 29, 2016 and removed December 7, 2016 (in service for ~ 8 months).
I've attached photos which show the condition and simplicity both of the external and internal components. Worked great for me, extremely quiet unlike larger units I've been around.
What's included:Complete Rutland 503 Windcharger
Rutland SR60 Regulator
Stainless Steel Attaching Hardware
Adapter Spacer for 1 5/8" ID tube
Location: Long Beach, CA
Price: $250 + Shipping (Free local pickup @ Shoreline Marina)