I have 4 x Acer 27" 1920x1080 monitors
2x2 Monitor Stand
4x4 HDMI Matrix Switch with remote
4 Power cables for monitors and the power supply for the matrix switch.
The $150 price is for all monitors, rack and the switch.
All monitors work and I was using as recently as Monday.
For those that do not know, the 4x4 matrix switch will allow 4 computers to independently display on 4 monitors. It will not provide video capabilities above what the computer does. I had 2 computers that both could support 2 monitors and was able to put any of those displays in any position. If you have questions, please feel free to ask.
Full disclosure, 2 buttons on the HDMI matrix switch are not working properly, but the remote can control all monitors.
I want to sell the whole setup and not part it out.