Creating Grocery Store using magento or prestashop

If you have built Grocery Store using magento or prestashop kindly show me the demo in your message with the link to its admin so that I can go through it and then if I like both the admin and the front end of it I will buy it. Please don't bid if you cannot show me the live demo with admin access to it as I simply want to buy it and use it and not interested getting it developed. Thanks