Complete Inventory System Design Clone of cardkingdom.com

I would like to develop a website which is similar to [login to view URL] with a complete inventory system.( I will provide the design layout of the website) The major part of this project is not about the layout of the web site. A complicate inventory system is a major part of this project. I am currently use [login to view URL] ‘s system to manage my website and ebay auction, their system is very user friendly and I want my inventory system have at least 50% of it’s functionality and having at least the same level of user friendly Here is some basic requirement: - A database which can change the selling price of each items basic on demand and supply. I will provide the equation about how to do this. - I need a multiple search engine to search multipide item at once from my database – Here is the example : [login to view URL];main=builder - Also, I need an advance search engine like this one -- [login to view URL];main=advanced - A database for all inventory items - A complete check out system - Payment tracking – paypal , Credit card ([login to view URL]) – not sure if API knowledge is require or not. - A log in system for member. - A database to store customer’s Data - Secerity – I should be able to choose which part of the system is available for use to which employee ID - A database which can change the buying price of each items according to the inventory level and selling price. I will provide the equation. - A database to store customer’s Data - A order page show all the order in the chosen period of time This project is complicated and please place bid only if you are serious. I require the services provider send me some previous projects as a reference. But, please email me and I will provide more information about this project. If you are interested, please first register to become [login to view URL] ‘s member and understand how everything works. It is free to use in the first two weeks, try it and we will talk about it. Also, I am a Chinese and it will be great if you company have something who can talk in Chinese by avoiding confusion. I am not a programmer and I don’t know what kind of technique is required. Please ignore what I typed in Job type if it is not applicable.