Any had this monitor before 40" 4k

Im looking for a nice clean 40" 4k monitor is this any good? http://www.ebay.com/itm/Perfect-Crossover-COCO402UT-40-UHD-TV-4K-60Hz-3840x2160-VA-UHD-LED-TV-Monitor-/322079869894?hash=item4afd74cbc6:g:TFAAAOSwI2dXFYq0#shpCntId

how about this? http://www.ebay.com/itm/WASABI-MANGO-40-UHD400-REAK-4K-HDMI-2-0-DP1-2-3840X2160-LED-Monitor-Remote-/222028286408?hash=item33b1eac9c8:g:xBsAAOSwe7BWxqBo

I imagine that it is basically a smaller version of this, but that is just a guess.

what about this ? http://www.ebay.com/itm/Perfect-Crossover-COCO402UT-40-UHD-TV-4K-60Hz-3840x2160-VA-UHD-LED-TV-Monitor-/322079869894?hash=item4afd74cbc6:g:TFAAAOSwI2dXFYq0

OP, keep your monitor threads to one to make replying easier.

Hi I have the Wasabi Mango uhd 40. Very happy with it. It arrived in perfect condition no dead pixels, color is good to my eyes. I haven't noticed any flickering, or light bleed.