i don't find the offer in ebay. But i have to say, that i had a kanex pro cubeup 2d 3d converter switcher box some months ago.., the conversion quality was ok, better than from cheap 3D converter boxes.., the 3D effect was without mistakes.., but in some cases not very strong. the conversion quality of the LG Cinema 2013 TV's 2012/2013 is better.
And there was a noticable output video lag.., it was annoying to use the converter box with a mediaplayer. Because it took more time to navigate through the player menus