When I click on each of the links in post #1 I get

This posting has been flagged for removal
(The title on the listings page will be removed in just a few minutes.)

The one in #54 specifically says "please don't flag" ...

How do I recognize a byb on Craigslist? Is this one?
http://chicago.craigslist.org/chc/pet/1635213686.html