I'm not sure if this would bother anyone else, but there's a major flaw in the concept that I can see that would turn me off right away. Allow me to outline the flaw with a scenario:
1) I would like to buy a 42" plasma TV.
2) Person A has a 42" plasma TV and tells me that he wants to sell it to me for X dollars.
No problem so far, right? But wait...
3) Person B works for a promotional company whereby I can subscribe to at least 10 overpriced "promotional offers" and receive a 42" plasma TV for free. Not what I wanted.
4) Person C works for another promotional company where I can take a short survey for a 1 in a zillion chance to win the same TV. Also not what I wanted.
5) Person D wants to show me his eBay store full of products that may be tangentally related to a 42" plasma TV but don't actually include the TV.
And so on and so on. In other words, I get a whole bunch of unrelated or spammy offers that I want nothing whatsoever to do with.
So...my question to you is "how are you going to ensure that, when I post an ad, I'm not going to get a whole bunch of unrelated BS?" Don't answer me here...answer me on your site.
Some other problems with your idea:
- Craigslist DOES have a wanted section, although it's buried in their "for sale" section.
http://sfbay.craigslist.org/wan/
- You're limited to the US. I'm in Canada. Therefore, your site is of no use to me personally. And I won't be the only one.
- It looks like, rather than build your site to your specs, you bastardized a copy of phpBB and hacked it for your own purposes. This traditionally leads to issues with sites.
That's about all I can see, because I'm tired now.