eCommerce Subscription Svc.

[eqitec]

I've built a solution which outputs multiple reports as pdfs that I want to sell via eCommerce Subscription software. The customer would subscribe for a fixed # of reports. Upon downloading reports, their account would be decremented to zero, at which point they would have to renew their subscription.

Does anyone have a recommendation concerning such software or service that would be a good fit for this need?

Thanks.