I have a Forgen 500 Vertical Wind Generator for sale.. was on my boat for a short period whilst it was on a swing mooring on the Clyde... ideal for keep you batteries topped up over the winter on the hard... or for a bit extra to run your fridge whilst at anchor.... fit an forget.. no regulators etc req..
For info see
http://www.seateach.com/Forgen.aspMounting is via bracket supplied to mast / side of roof / hull or pole (25mm)
Cost me over £400.. has been used only for around 4 months.. grab a bargin £200 or swap for a decent sized dinghy
CJ