After reviewing your detailed description, we believe, Magento CMS would the perfect choice to build your website. However, we are open with any CMS or framework. There will be an Admin Panel which will enable you to change/manage the products or other contents of the website. We would integrate an auto suggestion option to boost the sales. All other features like Advance Search, Various category & sub-category, buying digital products (ebook, mp3 files etc), Sipping Calculator with UPS/USPS API, Tax calculator for Shipping, Secure Online Payment PayPal/Cards), a minimum level of ordering, User Account, Sign Up/In etc will be integrated and incorporated within the site. An email invoice will be sent to both the seller and buyer after make an order with and an Unique customer number will be generated automatically as well. We would implement Google analytic which will generate detailed statistics about the traffic and traffic sources and measures conversions and sales. We would also integrate the inventory tracker to track the products. All other features will also be integrated within the website.
We would make it Responsive so that it could be working on all devices (screen, laptop, mobile, tablet etc) with fluid navigation quality. Finally, we would assist you to launch the site and provide you 3 months of free support after the launch.
We are a 15+ years-old Software and Web Development organization, based in Largo, Maryland, USA with 130+ in-house developers & designers