I have used OS Commerce earlier. It's free, open source and works like a charm. You need a webhost that support php and mysql, most webhosts do that. Some even provide automatic installers for it.
I have too few posts on this forum to provide the link, but do a search on google for oscommerce and it's on the top.
I have too few posts on this forum to provide the link, but do a search on google for oscommerce and it's on the top.