I'm looking to buy a professional style 30" computer display and I'm curious as to what the lowest price I would pay to get a 30" display is - used or otherwise. For reference I'm talking about top of the line HP monitors, NEC, LG, etc that support 2560 x 1600 (not just a TV that's a 30" or 32" that's only 1920 x 1080). Just trying to get an idea of what I should expect to spend.