Nelson figures out his Netflix usage means he's paying about $11 a disc. I calculated mine over four years and it comes in at just over $2 a disc—that's just about what it'd cost me if I rented from my local store.
An interesting calculation would be to see how many discs I've actually watched. I'm very good at sending back what I won't watch.
[You can find out how many discs you've returned here] (this is screaming for a proper analyzation script, of course.)