Right now, Woot! has a couple of Roku's streamers on sale. This sale goes until December 11th at 12am CT. So you'll want to hurry up and grab yours before they are gone. They are offering the Roku HDMI Streaming stick for $32.99, and the Roku 3 Streaming Media Player for just $64.99. Both are factory reconditioned, so they aren't exactly brand new. But it's still a pretty decent deal. You can pick them up from the links below. Woot also has a ton of other goodies on sale, make sure you check those out.
Roku Streaming Stick - $32.99
Roku 3 Streaming Media Player - $64.99