Community Forum

I have an exsisting website that I would like to install a "Community Forum" within one section. Here is a link to the website page the Forum would be housed within: [login to view URL];osCsid=dba67a725afab888481e2ff0c9a3f29c I would like the forum to be customized to have a consistant look and feel of the exsisting website and be housed "within" the website so the user isn't taken off of the page. The main function of the Forum would be for users to create accounts and post items to BUY, SELL or TRADE. No transactions would occur on the website, just a place for people to post items. A user must create an account to be able to post items to minimize inappropriate postings. We would like there to be a way to query the Forum database for BUY, SELL or TRADE since these will be the three only items people will be posting. The user must be able to upload photos of the products they are buying, selling or trading. When the user creates an account and would capture the Name, Email or Phone. When they make a posting we would want them to be able to post a Headline, Message body, Photo and Price. I have looked at various forums on the web to purchase, some to use open source. I would look to you for suggestions on a proven solution that could work for our needs. Thank you for your bids! Please let me know if you have any questions.