Ecommerce web site

I am looking to start up a website that will have a link through to an online ecommerce facility that will allow users to select from a basic catalog - about 10 categories, 50 products in each max - but probably most will be far fewer. I would need a basic site that can integrate into Worldpay (we have a merchant account). It would also need to be simple to update and add/delete products. I do not need Amazon style features, but it could just use a standard ecommerce application.