I got the MK808B for $48. It's a dual core 1GB PC with WIFI in the size of a thumb drive. It comes with Android and connects to TV via HMDI. Works pretty well as a Android TV device. Want to get another one to install Linux to play with it.
I have been playing w/ an MK802 stick and it has a few issues.
http://www.amazon.com/gp/offer-listing/B00ALSZNLW/ref=dp_olp...
PicUntu http://ubuntu.g8.net/ seems to got Ubuntu booted and running on the device.