What will you get out of it either way, you lodge a non payer dispute, they will get a strike and you will still be without a sale. You lodge a mutual cancellation and you will be without a sale.

If it had been someone with lots of feedback, a long term ebay membership and should have known better i would say lodge as a non paying buyer.

Seeing as they " may " be a newbie who doesnt have too much of a clue, i would be leaning towards giving them the benefit of the doubt.

We have all heard about people not knowing how this really works and bidding on the same item multiple times not knowing they may win more than once.

It may not be the case of them being a newbie they could be an old timer under a new name i dont know.

But if you give them the benefit of the doubt, maybe send them an email explaining you could have had them issued with a strike, but because they are new you wont and hope they learn a little more about ebay before buying.

You may end up with a potential future loyal customer from your understanding and customer service. ( thats if you want them )