I’m afraid you won’t find a true NTSC broadcast monitor in your price range. A quick Google brought up a used 14″ Sony for $1200. It just came off lease. Used monitors are your best bet but I’d check them over personally to get one that’s truly pristine. You are right to look for an ntsc monitor but you’d be taking video out through a video card that has a bnc composite connector into the bnc connector on the monitor.
Good place to ask this question. So if I get a regular tv with s-video and plug it into my graphics card, is the picture going to at least be clear? I tried once getting a modulator that went s-video to the modulator, out through cable into a regular t.v. and the picture was almost unrecognizable.
I did as Walter suggests above and bought a used PVM 1354Q for just over $400 on eBay. The price savings was worth the risk for me at this stage. At some point when the work justifies it I’ll invest in a multi-format monitor, but for now I know I can trust this monitor for NTSC color correction.