Cousin Stanley wrote:
You might check ....
http://oscommerce.com/
"osCommerce is the leading Open Source online shop e-commerce
solution that is powered by a dedicated, strong, and ever growing
community, and is Freely available under the GNU General Public
License."
Saw this link for the first time only yesterday
so I have no personal experience with the software ....
Several years ago I set up two instances of osCommerce for some friends of mine. One was for an online hunting supplies store, and the other for a store selling...stuff like keychain flashlights, etc.
I didn't love the interface, or the default templates, or the coding style when I had to modify it, but the system did work. Processing orders and shipping did work. They've since closed the stores due to being too busy with other jobs.
I honestly don't know how it measures up as far as security goes, but it's been several years, so there should be some data for you to look at and make a decision on.