P.S.
If they only want you to email them to do the transaction it could be a scam.
If they are @GMAIL.com they are scammers.
have a look at this one.
http://cgi.ebay.com.au/Wellcraft-Scarab-29-30ft-LOA-Offshore-Powerboat-/220671288551?pt=AU_Boats&hash=item336108a4e7

Stupid Buy It Now price and the say that it is in WA and their addy is ACT
Oh and that boat is worth at least twice as much..