Hi there georgeatwork, the free version of Auctiva does not allow you to work off line. I believe the free Mister Poster that auctiva offers does but I have not used it.
You can preview your listings. Auctiva will append a blurb to your listings.
The Auctiva gallery is a nice feature but I suggest using it as a bottom appended feature rather than the Auctiva default of top.
Also get rid of your email address on here! Unless you want spam email NEVER post a direct link to your email addy!