Sorts the products in ProductArray.
(in) Sort the products by the lowest current price of the items available. The product with the lowest-priced item is returned first.
(in) Sort the products by the highest current price of the items available. The product with the highest-priced item is returned first.
(in) Sort the products by sales rank. The product with the highest sales rank (i.e., the best-selling product) is returned first. The rules that are used to determine the sales rank vary for each product type and are not disclosed in this documentation. However, in general, the sales rank is based on the number of items sold on Express and/or the main eBay site. This is the default.
(out) Reserved for internal or future use.