To add a link in you forum post here just highlight the address of the web address in the Ebay window - then press "control + C" to store it in your computers temporary memory. Then press "control + V" to make it paste into your forum post here like magic.
If you want to make it the color blue which automatically makes a persons window open that link in a new window when they click on it - click on the icon that looks like a little globe with a chain link in front of it. Then paste the web address in the window that will pop up when you click on the globe icon. Give it a try.