Firstly... It's craigslist.
ORG. Not to be picky but if you choose to check out this site, it'll help if the URL is correct.
Craigslist is a national (USA) classified add site. While it looks cheesy, I've found and sold many useful things in the past.
I have found a "clone" of craigslist, kaboo.org. It looks identicle. Go figure...
The only difference is that Kaboo.org doesn't cover as many states as Craigslist.org.
Posting an add is soooooo easy. It's just like composing an email in hotmail or yahoo. You type your info in the form, upload a pic if you have one and submit! You have to confirm via a link that they send to your email addy and then your add is posted!
Piece of cake!