Hi Richard, and welcome.
As far as the guitar is concerned, it's an Alembic.
As far as the listing is concerned, the seller's feedback rating is shown as private, which is a bit unusual. But when you click on feedback comments, you can see that the seller has a lot of postive feedback over the past two years.
To increase your comfort level, you may want to email the seller and ask for his name, physical address and phone number; then look that up on the white pages on-line and confirm it. If you're really serious, call him up and chat with him about shipping etc. and get a better feel for him as a person.
I think it's a beautiful guitar.