Very dodgy............

Just say that to them. Sorry, if your are willing to purchase the car, you will need to come here and person to sign it over etc.

Or,

Sorry, due to some techinal issues with my computer at the moment, i am unable to get onto my paypal account. I am writing this from a friends computer.Is there a number I could call you on to discuss another arrangement? (chances being, they wont have phone hahaha)

Ive heard the marine scam before on here too...

dont do it hun.