2nd Display?

I am using an NEC 26" for my critical work, but ever since I sold my G5 tower with its funky old Apple 20", Ive been without a second display.

I always thought having the second was an unnecessary luxury, but over the last few months I see how much easier it makes a days workflow.

Anyone have a recommendation for a really cheap, not necessarily widescreen (I dont need horizontal real estate for a smaller monitor) but fairly reliable old or new model LCD monitor out there? I have been looking at the $99-$150 20" options at Best Buy (Acer, Asus, Dell & LG).

Im hoping for the same price I can get a slightly better brand&model off a reseller on eBay. Of course, at this price I dont expect it to handle color critical stuff.