I decided a week or two ago that I had so many parakeet toys around the house that I should sell them. So I stayed up all night and coded my own ASP shopping cart. You can see it here - http://www.lisashea.com/petinfo/toys/index.html
it's very simple, people click on links to add items into their cart. The cart data is stored in a SQL database so that even if they don't end up buying it, they can either come back in a few days and buy it, and also you can look in the database and see what people were thinking about buying.
Please play with it a bit and let me know if it's easy to use, and if people like it, I'll be happy to post the code!