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.

For used cars, gumtree is the business. I just sold a used car on there and had several times the response I did from the same ad on carsales.com.au, which cost $60, was much harder to use and so was basically poor value for money.

That's eBay's property too.