As several readers have pointed out, Houses of the Blooded is currently available as a pdf for only $5 at Indie Press Revolution. That's too good a deal to pass up--no waiting for Christmas on this one!
If that's still too rich for your blood, or if you just love old-school gaming, there's also OSRIC 2.0, which is just now released and available for free. I downloaded this last night, and am hugely impressed by the clear professionalism and effort of this product. I haven't been able to stop reading it! This is ~400 pages of old-school, well-crafted excellence. Everyone who worked on this deserves a cold drink and a handshake. Well done all around.
On a personal note, I'm selling some of my book collection here and here (2 books for $20, and free shipping in the U.S.) in an attempt to have a little more Christmas money for my girls. So if you see anything you like, shoot me an email (mail.rpgblog(at)gmail.com) or PM me at those sites.