When creating an auction item, you'll need to choose one of the bidding types from the "What kind of bidding would you like for this item?" drop down menu (in the Pricing Details section). Here is an explanation of the different types:
Online and Mobile: This is intended for items that will only be available for bidding online. Bidders can bid online from their mobile devices as well.
Online to Bid Sheet: This is for items that will start with online bidding and then finish at a live event with bidding taking place on a bid sheet or at a live/gaveled auction. In order to download a bid sheet for an item, the online auction must close first.
Live Event Only: This is for items that will only be available for bidding at a live event, either with a bid sheet or live/gaveled auction or as a raffle item.
Buy Now Only: This selection allows you to sell the item for a fixed price. You can also include a quantity that's available for purchase. Bidders cannot bid on these items.