If you have one item for sale, you should use the standard auction option. If you have multiple different items for sale (8 oz FO, 1 LB kokum butter, 3 soap molds, etc) you should create a separate standard auction for each item or lot. A lot is a group of items that are being sold together for one price (e.g., 10 lip balm tubes for $2). If you have multiple of the same item, that are not being sold as a lot, you should use the Dutch Auction option. For example, if you have 100 bags for sale and you want to sell all 100 to the same person, you should sell them as a lot of 100 for $X in a standard auction. If you have 100 bags for sale and don't care whether people want 1 bag, 20 bags, or all 100 bags, list 100 bags at $X a piece using the Dutch auction option.