This is an in-ceiling screen that is designed to be installed when the HT is built, it's not a stand-alone unit.
It is also quite small if using 16:9 video (effectively about a 91" screen).
The screen material is matte white which means it will need to be used in a HT with absolutely minimal (preferably no) ambient light, and with a PJ that has good black levels out of the box.
The cost of this screen is in it's electronics not it's screen material. It sells for around $2000 so I would question why someone was selling one for only a tenth of that. :huh:
Another link for this: http://www.adorama.com/DLADE6080MW.html