damned new quoting got me again . . . I really should preview before posting.

Previous post should have been:

LEADER OF THE BAND..... what would be the implications for the buyer supplied the incorrect credit card details given that the photo licence will correlate identification???

They buyer wouldn't give a toss as they could be long gone by the time the scam is exposed.  Fake ID's do exist.  Fake licences and credit cards exist.  Identity fraud exists.  A lot of identity thieves are good at what they do, and good at avoiding capture.

I saw on one of those TodayTonight/ACA shows recently where you can get fake licences and credit cards in Asia for cheap.  I think it was in Indonesia but I can't be absolutely sure of that.  I remember it because they took Pauline Hanson over there to berate them.

As for registration of the boat, what if the scammer doesn't fill in any paperwork on the day they pick up.  What if they are a very good scammer and convince the seller to only fill in his details as he is buying the boat for his sister's husband, and his brother-in-law will be the one transferring/registering the boat.  Remember, the scammer tells a good story.  He convinces the seller that the credit card used to fund the PayPal payment belongs to his brother-in-law, which is why he can't produce the card when picking up.  After all, it is only right that his brother should fund the PayPal payment isn't it?  But he offers to show all of his (fake) ID to the seller, including his own (fake) credit card.

Then, the scammer sells the boat a fortnight later telling the new unsuspecting buyer that he bought the boat on behalf of his brother and now his brother has changed his mind so he is selling it at a good price to get some of his money back (his brother got a job in a central Qld mine and doesn't need a boat now).  He has paperwork to enable transfer of registration, so the new buyer thinks everything is okay.  Remember, the scammer can tell a good and convincing story.  They tell the new buyer that he hasn't had the boat long enough to get around to transferring the boat into their name, and it would have cost money in stamp duty.

Look, I know this storyline is long winded, far-fetched and a bit of fantasy, but scammers are good at making that stuff real for unsuspecting sellers and buyers.  The OP seems to me that he is 'old school', i.e. 'a handshake is as good as a contract' kind of guy . . . . . the type that can easily be scammed by 'new school' scammers in the 21st century.