I would like to create a shopping cart that can deduct quantities when an item is purchased, am not interested in anything thats already out there. I wish to learn how to do it myself I have basic PHP and MySQL skills and wish to learn more by doing tutorials and experimenting with scripts , is there any good tutorials out there that I can cover up soon. Advance thanks for any suggestions or opinions.

I am also a beginner in this field.Shopping cart software is software used in e-commerce to assist people making purchases online.It offers convenient and smart way to shop on eBay.I got information about this is from the links below.You can check these sites.Hope it helped you.Thanks.

http://www.phpwebcommerce.com/
http://pages.ebay.in/