I think we're at the point where it's no longer sensible to pay more than $150 for a 22-inch LCD. I've posted numerous monitors at that price, and here's one that's even less: TigerDirect has a refurbished Acer X223Wbd 22-inch widescreen LCD for $139.97.
Shipping isn't free, but it's a very reasonable $1.99. That brings your out-the-door total to $141.96 -- a really amazing price for a monitor of this size.
And check out the specs: 1,680 x 1,050 native resolution, 5ms response time, 2500:1 contrast ratio, and VGA/DVI inputs. It's even HDCP-compatible, meaning you can watch Blu-ray and other protected content if your PC is pulling media-center duty.
Of course, because it's a refurb, your warranty expires after just 90 days. I don't consider that a showstopper, as the problem with most LCDs is a dead pixel or two--and that's something you usually see immediately.
Thus, if you're on the prowl for a bigger or secondary monitor, here's your chance to score a big 'un on the cheap. Really, really cheap.