We are currently developing a similar web site for a customer in USA. They require us to deliver ecomm site with POS for their physical sales outlet and a inventory management system that is common for sales via ecomm site as well as their outlet. Which means that wherever the sale is happening, the inventory will get updated automatically. Eventually, they also want to connect their several stores for individual inventory management yet have a single ecomm site since the products they sell at all their outlets are the same and supplied through the single warehouse. This system will be ready in another about 5 - 7 days. If a similar system is of interest to you, do let me know. We will host your site free of cost on our shared server with provision for unlimited number of product listing. We charge on a small initial cost (Rs. 5,000) plus Rs. 1800 per month for ecomm site and Rs. 1200 per month for POS. If you take both, the charges are Rs. 2750 per month. These charges are for annual billing.