Django payment processing
Django paypal is very cool. I've used in on couple of my projects. It is relatively easy to integrate with an existing website. 
Satchmo is good, if you want a full internet store, but if you want to sell just couple items from your website, which is devoted to something else, you will find Satchmo to be very heavy (a lot of dependencies to install, really complicates your admin).
Can anyone suggest any good payment processing libraries for python/django?