Selling eBooks/paid PDF downloads

Any PHP pay per download scripts

[surfgatinho]

I ahve a client who wants to be able to sell PDF reports and books off his website.
Does anybody know of any good lightweight PHP scripts that would allow this and integrate with a payment solution?

Thanks in advance,
Chris

[JonR28]

I believe paypal has a pay-per-download module.

[Corey Bryant]

Are you,looking for a PHP / ASP solution? Do you want to secure the downloads and possibly limit the downloads to each visitor?

-Corey

[ligel]

I'm interested too.