Buy Collective Site

Hi guys our company needs a pre built collective buying script,[Edited by Admin] inspired by [login to view URL],and the system must achieve the following requirements: 1 - PHP/MySql based; 2 - Fully social networks integration; 3 - register customers automatically with nice ui 4 - integrated with paypal; 5 - show all cupons in pdf; 6 - allows activation of coupons; 7 - users can register their own account using email. 8 - admin account can control the backend of website. 9 -Ability to set a minimum number of coupons that need to be sold before the ‘Deal’ becomes available. If members purchase a ‘Deal’ that does not reach the minimum, they are automatically sent an email stating that the ‘Deal’ closed. 10 - Every body can subscribe daily deal information from his/her own city. 11 - Every body can share deal information on facebook, twitter, MSN or email 12 - Registered user can get rebate if he/she invites friends successfully 13 - Users can also check previous deals on website 14 - 3 levels access: Free,Registered and Premium [Edited by Admin] inspired by [login to view URL]