Identify those items that you wish to check for in the eBay Catalogue
At the end of the registration process orkisort will download your existing eBay listings and display them in a table format that you can sort and order. To find out if your listings have a potential catalogue match simply check the box on the left hand side of each listing that you are interested in and choose the Look Up Listing option from the Action drop down box. You can check a fixed number of listings each month - you'll see the count is decreased each time you check for a match or catalogue hit.
If you want orkisort to check for new listings on your eBay account you can do this from your Account Settings.