You can get them for as little as £30 quid wins but I've bought cheap b4 and always come unstuck, I was looking at a preloaded one for about £80 Keggers but bear in mind the box itself is only worth about £50.
If anybody is going down that route this is probably the best deal due to the sellers software and support...plus when you do a factory reset on his box, it resets with all the initial software back in place not a complete wipeout like usual boxes do.
http://www.ebay.co.uk/itm/XBMC-GOTH...ctronics_VideoSwitches_SM&hash=item3a8673213b
He also has cheaper boxes but you should be going for a quad core like the one I listed.
It doesn't take a lot of effort though to get your own box like I have and install the software yourself, I opted for one bit dearer than the rest (MiniX NEO X8-H) but is supposed to be the dogs bollox of the android tv box world and it is.
I've had it for a couple of days now and it pisses on the raspberry pi in terms of speed and smoothness, it also comes with a free air mouse remote which makes controlling it a piece of cake.
You do only need to connect it to the Internet and tele Keggers, The wireless range on the one I bought is superb, better than any pc, tablet or mobilephone I have in the house, I can use it in any room of the house without a problem, although it will be based in the living room (same room as the router) so the range doesn't really mater to me, any wireless android box should work within that range.
I can watch anything I want on it, live sports are a bit ropey depending on who's streaming them, but movies and tv series are crystal clear in 1080p, plus the box I bought is also capable of playing 4k movies making it future proof.
It's like an android phone in a box Keggers but with a lot more powerful graphics processor.