Company website

Hi there, I am wanting a website for my business which exports machinery from New Zealand. I would like a general website that advertises who I am, but also has a product 'area' where potential customers can go and l see what I have available to sell. I would like it set up so they can Log In and make orders, but they dont necessarily need to pay for the goods on the site directly. Behind the scenes though, I would like a database of my goods that can be accessed only by my employees where they can log in and check on the status of a good, ie. Has it been shipped etc? Regards Hayden