Ebay rip you off on delivery, and there are a lot of dodgy sellers.
Why not buy from somewhere like
http://www.tinydeal.com/index.php?ma...dex&cPath=1_93
or
http://www.mp4nation.net/catalog/
Better prices than Ebay too.
The conversion free Rockchip 27xx series are good, you'll find most, but not all video's will play ok including Youtubes