Tarsnap is extremely low cost as it is for the service it offers.
Edit: in most HNers opinion.
Edit: in most HNers opinion.
While I'm at it, a feature I would love to see in tarsnap is server side pruning of old archives so I can remove the delete permissions from my production keys and not have to setup a secondary pruning server.
That's not possible -- the service doesn't know which old blocks are being reused in new archives.