Some sellers duplicate Auction lots. I duplicate the Inventory Item. If you do not create an Inventory Item for each item, you will not be able to use some reports or track inventory. As Auction wizard will not know the new item exists other than in Auction lots.
So what I do is if I have four sizes of pants. I create an Inventory Item for the first size and then create three more for each size totallying four Inventory item,
Does that help?
Visit my eBay store!