Note that you can use many CMS for your online shop which will be more suitable for your needs. Because you can easy manage the shop products and changing the prices. For example you can use OsCommerce or Presta Shop. More detailed information about them you are able to see following the links below:
In addition you can install the OScommerce in your hosting account with us very easy using our Elefante one-click installer which is available under the WebTools section.
If you have any additional questions, please let us know.