I think this topic has come up before, but Big Finish is a British company that does full cast audio dramas of "Doctor Who" (and other things) using the "classic" doctors. If you've never heard any, they're very well done with movie theater sound coming out of your headphones...similar to the "Star Wars Radio Shows". Anyway, they're trying a new lower priced deal to see how it works and see if it helps reduce the piracy they face. You can try two of their stories for $1 each (download). They're also releasing some box sets for $20. I haven't heard any of these, but I've heard a lot of what they do and it is excellent. If you're a "Who" fan or a fan of audio drama, this is a great time to check them out.
http://www.bigfinish.com/ranges/v/doctor-who---special-releases (http://www.bigfinish.com/ranges/v/doctor-who---special-releases)
Have you subscribed to Big Finish's excellent podcast? It includes audio clips from many of its shows. Thanks for the information about the pricing.