Private Shop

We need an online shop with the following features: 1. CUSTOMERS LOGIN - INVITE ONLY SYSTEM: · Only users with an invitation can register and get to the shop (as gmail used to be) · Registered users get invitations to send other people (when the buy) · If any referral e-mail adresses sign up for an invitation and buy, the parent user receives "points" or "money to spend at our shop" · IMPORTANT: EASY TO MANAGE EVERYTHING FROM OUR "BACKEND / CONTROL PANEL", ADD USER, REMOVE USER, USER PERMISSION, USER LIST, USERS STATISTICS, MAILING TO USERS. 2. SELLING SYSTEM BASED ON "CAMPAIGNS" (AS VENTE-PRIVEE): · Selling campaigns with a determinated time period (editable) 3. COMMON THINGS OF THE SHOPS: · SHOPPING CART, STOCK CONTROL, SHIPPING COSTS, DISCOUNTS AND PROMOTIONS,RELATIVE PRODUCTS, STATISTICS. VERY VERY IMPORTANT, WE NEED IT TO BE AS SIMPLE AS IT CAN BE, EASY TO MANAGE FROM THE BACKEND, EASY TO MANAGE FOR THE USERS. FOR EXAMPLE: PLNDR DOT NET WE NEED IT AS SOON AS POSSIBLE.