Payments with Paypal

I want to do something simple: collect payments/donations with Paypal. I think that installing Ubercart is a bit heavy for something this simple. I want people to just go to the site and make a payment, possibly entering their email addresses so I can send them a thank you.

Which is the best Paypal module to use for this purpose with Drupal 7? If no module is available for 7, I'll install Drupal 6.

Thanks so much!

The Paypal Donation module has a release for Drupal 7. The lm_paypal module would also handle what you're wanting to do, but there isn't yet a Drupal 7 release.

The worked payment module in Drupal 7 is ecommerce module.