Hello shirley_j,
If you are just selling them together, then you can simply list them as an auction style listing making sure you choose the radio button for "Auction" underneath "Sale Type" in the top left of the Auctiva lister page.
If you would like to sell them separately from a single listing, then you can choose the radio button for "Fixed Price" underneath "Sale Type" in the top left of the Auctiva lister page. This will then allow you to enter a quantity of more than 1 for your listing. Please note that when you enter a quantity of more than one, in the "Shipping Tools" section of your listing you will need to enter a value for "Additional Item Cost" in case a buyer decides to purchase multiple items from your Fixed Price listing.
If you have any difficulty creating your multiple quantity listings, please feel free to contact our Customer Support team by mousing over the “Help” tab within your account and selecting the “File Support Case” option.
Thank you!