Yeah, funnily enough I listed the boat on gumtree as well, but got nothing but scammers! There was about 5 people that contacted me trying to run this scam: http://www.mactalk.com.au/8/80486-paypal-scam-carsguide.html

With the listing on e-bay I got two enquiries, both of which were legit. One of the interested parties ended up buying.