ECommerce Website needed

Hello, We need an ecommerce website designed and built. You can use any back end you like, but we prefer to use PayPal as the checkout, so that will need to be integrated. Also, the product pages can all follow a single template design, but there must be the ability to have up to 8 product images, along with a description, and the ability to choose up to 4 attributes (size, color, etc.). Last, we need the ability to upload the products and images into the site using a spreadsheet or csv file. We have a lot of products to add, and we want to make sure from the beginning that the process is easy and streamlined. We would also like the site to have a search function for products. We realize that there are a lot of off-the-shelf solutions that can accomplish what we want, and we are fine with you using one of them provided the cost is reasonable. The other half of this project will be in designing the website, so it is absolutely a requirement that you provide examples of at least three other ecommerce sites that you have designed and built. Any questions please feel free to contact me. Thank you for looking, Mike