Boonex skill needed! urgent!

Neen boonex expert to build some addings to my website. - Two different member types. Seller and buyer. Sellers need to pay yearly fee to post sellingleads and answer buyingleads. Buyers can only post buyingleads and reply to sellingleads. Buyers can not reply to buyingleads. Payment must be trough moneybookers on my website! - A page where buying and selling leads are showed. Must be easy and friendly to use and to post leads! This is the stuff i need help with. Site is installed and up and running already! Contact me for further details!