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From TYPO3Wiki

Real Time Price Calculator (i.e. you see the total value of the product in real time, when you select or deselect multiple features - see dell.com for an existing example)

Should have payment gateways like paypal, firstpay Click&buy (germany),creditcards Did I miss any gateway? fell free to add some... (osCommerce has the following payment gateways: 2checkout.com, authorize.net, ipayment, paypal, psiGate, SECpay, trustcommerce)

Needs flexible pricing methods, e.g. XML-Catalogs that define a certain pricing mechanisms for a customer-article-relationship or for customer groups, article categories.

And flexible product catalogs, depending on the status of the customer. Could be a XML-solution.

RealURL integration to get nice URLs, e. g.: /products/shoes/boots.html, /products/shoes/boots/12345.html