Is there a site were internet where we can Trade Chloe Bags for Other Designer Bags??

Yes, you can do it here - but only once you have been an active member for at least 5 months and have a minimum post count of 500.

You then have to apply to the MP and be approved by Vlad and Megs.

Here's the thread about MP application requirements:

http://forum.purseblog.com/news-and-announcements/tpf-marketplaza-application-requirements-and-instructions-70788.html​