You're going to send an email to your friend telling them about:

Trading Post (http://www.autotrader.com.au/browse-auto/Automotive/)

Your email will read as the following:
Hi <Your friend's name>,
I found a good online shop that you maybe interest in.
Website : Trading Post
http://www.autotrader.com.au/browse-auto/Automotive/
I found this website at http://www.shophere.biz
Sincerely,
<Your name>
<Your email address>