I got mine for about $400 from Dell Small Business during a quarterly sale.
It's a very good monitor in a number of ways, but having said that, it does have one potential major defect that I know of: the backlight can leak fairly badly. This was a known problem in earlier versions of this monitor, and has supposedly been fixed. Mine however, does have fairly annoying light leaks at all four corners (and was bought fairly recently). It's not a problem when I use it for Web surfing or editing music in Logic (in fact, it's great for that), but if you want to watch a movie on it, or edit photos, the light leaks can prove troublesome (very annoying in a dark movie). I almost sent mine back.
Yes, it does have the same PANEL as the Apple Cinema, but it doesn't have the same backlight. Caveat emptor