I'm just wondering, out of curiosity, how much would you charge a client that wanted an eCommerce solution implemented on their site? For example; their design is done, domain, and hosting is all there. Just the 'shop' section on their site. They'd require categories, products, product pictures, Paypal payments, registration, and a zip/postcode-based delivery price system (seeing as some areas will cost more than others, etc) So how much would you charge for that? I'm not actively asking as a quote for a client, just seeing what the prices are like out there.
It depends what you define as implemented, do you mean you are going to develop a ecommerce script from scratch or are you simply looking at grabbing an existing ecommerce script and modding it to suit?