So you want a shopping cart, well the best on the market is the "ZEN CART". All info and tutorials are available on Zen Cart site http://www.zen-cart.com/ . If you need one (Want one) you'll know exactly what you getting. When you make your mind just let me know and I'll do it for you Contact.
Art of e-commerce
Zen Cart™ truly is the art of e-commerce; free, user-friendly, open source shopping cart software. The ecommerce web site design program is being developed by a group of like-minded shop owners, programmers, designers, and consultants that think ecommerce web design could be and should be done differently.
There are hundreds of shopping cart programs available, but none come close to offering the level of options, features and support available with Zen Cart™. Even the commercial programs have a hard time competing.