My local library has a surprisingly large collection of DVDs. Once I discovered this, I made an extensive search of their movie archives. As a result, I could reduce the number of movies in my queue from around 450 to around 320. Add to that the bonus that I can borrow more than "3-out" at a time, keep them for a week and it won't cost me a penny.
The downside is that their website/database is quite unflexible and sometimes you have to be a little creative to find what you're looking for, and for some reason they'll often have disc 1 in a series, but not the rest. Still, that gives you a chance to find out if the rest is worth checking out - without having to use a Netflix "slot" on it.
And of course there's the major downside that you may have to wait for a very long time for the movie to be available for you and there's no way of knowing when that'll happen, but hey, it's free*!
I use my local library a lot on top of my Netflix subscription. I can only recommend that you check out your library and see what they have in stock.
(*: Of course it's not free, you pay taxes to fund the upkeep of your local library. So why not use it? You'll pay the same taxes whether you use it or not. Get your money's worth!)