you use the CSS attribute "list-style: square" on the UL tag (either by inserting the code into your CSS stylesheet or by appending style="list-style: square" to your UL tag)
Most of the services are free. Limited postings cost money like posting job in certain part of CA and apartment listings in NY. For further information visit FAQ section of craigslist. There are few...
Like this:
<ul>
<li>first entry
<li>second entry
<li>...
</ul>
'ul' is 'unordered list', using bullet points. 'li' is an item in the list.
See related link to...