Hi, This is not an over bid, I went to the website and checked the complete functionality, it will take some database planning to create this. I will do it for you. Message me and we can get started.
Relevant Skills and Experience
I have created several customised projects for clients in php, mysql, html with payment integration and other customization.
Proposed Milestones
$90 USD - Layout and simple demo configurator
$180 USD - Admin controls/ dashboard and backend management
$180 USD - Ecommerce, UPS API and payment gateway integration
$150 USD - Automatic email generation, pdf invoices, shipping label and all remaining details
You must be thinking that its over bid, but trust me I put a lot of thought in it before bidding. Please reply and we can start on it right away.