194262 b2b marketplace site script

The script should create a site which should allow member (company) profiles to post selling and buying offers with pictures these posts should be deleted automatically within a given time period to avoid duplications. banner and ppc applications to send automatic e-mails to the members related with the new offers according to the member category and e-mail preferences. a forum (it can be a free opensource script) chat feature (it's not a must) automatic meta tagging on each page for especially forum (keyword, desciption) I hope you have demo of the site and the admin pannel.