Super easy to do...
1. Open a new tab in your browser
2. Navigate to the page you want to link at Ebay
3. Highlight everything in the browser window - eg: "www.ebay.com/whatever..."
4. Copy. Either right click with mouse on highlight and click "copy" or with the URL highlighted just hit "Crtrl C" on the keyboard
5. Go back to the other tab with the forum open.
6. Start or find thread you are working on, place cursor where you want, and hit "ctrl v". Link now in the thread!!
I have a feeling if a Tenere like this ever hits the US, that there will be a quick feeding frenzy for many of the parts!!!