GOG.com has an insane promotion of pay anything for eight selected Interplay games. They said "Pay as little as $0.01--get 8 Interplay Games." I just had to test it out to see how the credit card transaction would progress.
The transaction went through all good. My credit provider charges an international transaction fee on top of the foreign exchange rate. I am happy to say that the international transaction fee was ZERO! In the end I really did only pay 1 cent for 8 Interplay Games.
So, there IS something you can buy for 1 cent these days.
This sale is no longer on.