[Typo3] selling services

[Emanuele Zattin]

Hello,
i'm thinking about creating an ecommerce website using Typo3, but i want 
to sell services instead of products. In particular i'd like to sell the 
access to particular pages of the website containing finincial analisys 
results. I can find many nice extensions which can perfectly handle 
products selling, but they don't seem to easily allow to only sell services.
Any hint?