I started doing the same with dvds. I was the guest on a shared Netflix account. I was almost done with Avatar The Last Airbender when they started doing their lockout shit, so the next night I got the whole damn series and Legend of Korra on dvd. I forgot how awesome commentary and behind the scenes content can be.

And your local library has been hoarding dvds for years too so you can also use that, not to mention digital options.