1. Go to ebay
2. go to search (on the top)
3. go to seller
4. enter your e-mail address where it ask for "single seller"
5. click on "search" button
6. go to the top of the page where the address of ebay is listed. (located just above the entire ebay listing.) Highlight it and save it.
7. now get back to Greg's board, and paste it in the Optional Link URL.