Total scam. The ebay ads always have a email address they want you to communicate by, and that's a typical reply you got. If you look at the sellers other items for sale on their username they'll have dozens of single picture ads for cars and bikes with the same wording. They're quite practised in their trade though, few months back I was bored and tried to string the little blighters along. They sent me passport photo's and other ID documents to prove who they were requesting I send a copy of my licence or passport back. Some older couple in Wales I think but the usual working away, car in the Highlands bullcrap story.
I guess they only need one sucker every 100 tries and it still makes it worth while.