I'm writing this to you on one right now. I got the slightly more expensive version that swivels. 27" for $363 shipped. LG LCD panel (I opened it and confirmed). A number of dead pixels, but none in the center and they are only visible if you're 2" from the screen. At any reasonable distance, I can't make them out.

If you want an immaculate, brand name, warrantied monitor ... yeah, it's 1K. If you're willing to compromise on a few things, there are other options.

I imagine the disparity in availability has to do with the manufacturing technology. It's probably very difficult to make a zero-dead-pixel screen that is high resolution and very large.