Miva Merchant is a commercially designed shopping cart. At the time of this writing the Miva cart was available for $595 for a license covering up to 100 products in a maximum of 5 categories, and $995 for a cart license that will handle virtually unlimited number of products. Installation, configuration and customizations additional.
While Miva Merchant is a well proven and tested shopping cart solution, you should plan on some addtional expenses to cover future software version upgrades and to add features that are not standard.
Miva Merchant Shopping Cart Features: