
It is advertised for $NZ1.5 million on the boat's website.
Bethune's eco-boat smashed the round-the-world speed record on June 27 this year, on its second attempt, making the 24,000nm circumnavigation in 60 days, 23 hours and 49 minutes - beating the previous 10-year-old record by two weeks.
The 24m wave-percing tri-hull ran on biodiesel to demonstrate and draw global attention to the potential for alternative fuel sources.
Earthrace was built with non-toxic paint, hemp composite in the flooring, biodegradable lubricants and hydraulic fluid, and pumps out bilge water through a filter to prevent fuel waste going into the sea.
Its two 540hp engines have a cruising speed of 40kts.
Bethune has been promoting awareness of the environment and the sustainable use of resources, with a promotional tour visiting Europe, the UK, Caribbean and Australia, before returning to NZ.
But he is also seeking a qualified captain to skipper the boat from the UK, across the Atlantic, Caribbean and Pacific to arrive in Australia sometime in December.