Watt And Sea 600 hydro generator, new

New Watt & Sea 600W short leg (610mm) with 4 propellers (280mm/240mm/200mm/high-speed adjustable pitch).

Equipment has been used for 2 hours only (I temporarily mounted to my F-27 trimaran to measure the output; needed the data for a research project).

Output @ 10 knots measured at 40 amps.
Cost to buy new: over $8,000.
Offered at $4,000.
Location: Florida