paid content

What is best option for selling access to content based on this input:

1. User can buy one node
2. User can buy edition (taxonomy term - several articles are associated with this term, free and paid)

Have someone example for Drupal based site?

for now i have made small research and see that mostly people use
time based subscription by selling roles (Ubercart)

Additional it exist several other examples but nothing concrete.

I will appreciate every Drupal example with supscription, also i am interested in Userpoints integration.

tnx