Hi Goofee,
You can transfer your listings in bulk to Auctiva commerce. Go down the bottom of the page where you listings are and I think it's the last button that says "Export to commerce". Make sure you select them first, otherwise nothing happens.
To find them in your commerce store, look in "Imported Listings".
Good luck with your store.
Jen
BTW, you're in the wrong Forum Part, but luckily I have a shop too.