Build a Dynamic Website with data base with upload and download options in excel

I placed project before but could not get a quality bid, please bid if you have already a set up of professionals with you and you are a company and having at least more than 25 employees, please give me the relevant example of work you have done Details: My website will be having different vendors and their products with pictures (around more than 25000 pictures), when a user select any product (standard product name matching functionality), its gives comparative prices of all vendors in a list (and suggested selection of the cheaper one automatically), users will be able to change the suggested selection of product, products categories, subcategories like an online store, shopping cart also required, with various payments methods, picture upload and excel based price upload option with standard names of products is required, product matching functionality on backend is also required, newsletter, email account, users registration, user accounts are also require,