three monitors - three different shades of white

I wanted to renew my monitor front, because I have three different old monitors, the color fidelity and brightness but then with photo and video editing rather to be desired.
To make it short: I had within two weeks three s24c350 same time I whites despite spyder 4 per calibration not even begin to match brought here their different (!). the first was clearly yellowish, the second had a blue tint, or rather adjustment progress from top to bottom, the third was reddish. an absolute disaster!
and yes, the monitors were reset, yes, I have all the cables and connectors of the graphics card through changed and yes, I can deal with color profiles and dispcal. two of the parts I've returned, the third I miss the original packaging and I'll have to sell it well over the classifieds with loss. just plain annoying!
apart from the parts jiggle unbearable by their unstable feet and are not adjustable in height and angle of view-very unstable.

The summit was that the already open carton of a monitor and apparently for some time in use was (scratches on the stand, the date of production for half a year older than the other monitors). I do not want to know how carefully (or not) amazon returned monitors checked ...

Another tip: rather spend 60 euro more and we will see after the equally large dell u2414. as the sun rises, a completely different league to technology. Only the (height-adjustable! tiltable! tiltbare! super stable!) is the base already more output value!