If he's been in contact then I'd at least give him the option of another payment method (cheque or postal order) cos let's face it the whole point is selling your item. The option of second chance or relisting could be considered quite quickly if no payment is received, as it'll only take a day or two to send it 1st class, so nothing lost really. It's quite obvious that the buyer is an eBay noob with such a low feedback score and could have as easily have misread the listing (or just be stoopid) than be a scammer. I just think back to when I first used eBay with little or no FB and avoided the "buyers with less than 10 or whatever FB's need not bid" sort of listings to save having to convince the seller I was a genuine buyer - that said we all had to start somewhere.
Pete (been eBaying 5 years - 831 FB's @ 100%)