Need a simple eCommerce Website

I need a simple eCommerce website with payment gateway integration(Just paypal should be fine too). I am okay with any free template or any prior website designs that you have too. I am not looking for some Jazzy website, a simple design is fine too. I will not be listing more than 10 to 20 products. The website should be SEO optimized with SEO plugins and I should be able to play around with keywords from admin panel for SEO. I can provide four to five important keywords. Users should be able to register via Gmail, FB or continue purchase without registration too. I should be able to add the products from admin panel, provide price, and temporary price reduction, coupon code. When user raises any contact us enquiry, I should be able to look at the issues from the site admin panel and should also receive email notification. All the order details can be viewed from admin panel. Should have reports to look at all the order details, look at how many of one particular product was sold etc. All those I explained are typical features of any ecommerce websites just listing here some requirements and i except other features that will be default too. Couple of customizations I need are 1. The product I will be selling is a digital product (user will download a code). When a customer purchases an item, each and every customer will get unique code that will be emailed to them via email. They should also be able to download the item from the website, when they go to Order details page. The downloadable file should be in PDF format so does the email attachment. If the user has not registered with the website, he should be able to download the file using his email id and order number. Some product listings will have the same item with multiple quantity(ex: 3 quantities of XYZ code), in those cases he should get one PDF with all the codes. if he buys two separate product in same order, we can send both the products in separate PDF I have a PHP script that will generate the code. You can generate the file when the user orders it and send them an email. In the table, along with the order details, I should also be able to see the list of codes that were sent along with user details. If there is more than one code that is sent to the user, keep them comma separated. The PHP script has a variable (Key) used for code generation and I should be able to enter the code from admin panel. This code can be different for each and every product, so it should be in the add product section in the admin panel. This key is just a 4 digit number that needs to be added in the final output code. Nice to have: I should be able to modify the script file without doing a deployment. Nice to have : I should be able to download a barcode of the code. I have code to generate barcode. Need a checkmark in admin panel for products which when enabled will provide barcode for the code(number) 2. I am selling the same digital codes in ebay too. So I will want the eBay users to come and download the code from the website. This is similar to the unregistered users order download except that it will be a different page and there won’t be order number in the system. I should be able to generate dummy order numbers from the admin panel for each and every product and download them from admin panel or view them at least. When user purchases in ebay I will provide them this dummy order number and when the user provides this order number in the website, he should be able to download the product. This dummy number will not be in a sequence, it will be random number generation so users cannot guess and enter the numbers. User should get email as well when they click download. I am available over call in freelancer or in chat anytime if you need more details. Please do not bid low and after discussing for hours come back and raise the bid. Please accurate bid so it does not waste the time for both parties. I have couple of sample websites that I can show if you need.