BUILD AN ECOMMERCE PLATFORM -READ B4 BIDDING

I NEED A PLATFORM SIMILAR TO [login to view URL] THIS WILL BE DONE USING API'S OF VARIOUS MARKETPLACES. I WANT THE SELLER TO BE ABLE TO POST TO VARIOUS MARKETPLACES FROM ONE PLACE WITH ONE CLICK. HE WILL HAVE A COMMON INVENTORY AND INVOICING SECTION AND WILL BE ABLE TO TRACK SALES. WE'LL START WITH 2-3 MARKETPLACES AND THEN KEEP ON ADDING. THIS IS A LONG TERM PROJECT Remember - this will be done using API's and it has to be perfect. PLEASE SEND IN YOUR PROPOSAL ALONG WITH PRICE AND TIMELINE QUTE GENERAL BIDS WILL BE REJECTED