I've been looking at buying a second monitor for my rig for under $100 and I was considering this Samsung monitor: http://www.ebay.com/itm/Samsung-S22B150N-21-5-1080p-LED-Backlit-LCD-Monitor-5ms-LS22B150NS-ZM-/350900385302?pt=Computer_Monitors&hash=item51b34af616 I don't mind if it's used or refurbished and was looking for some input.
http://www.newegg.com/Product/Product.aspx?Item=N82E16824014343
Maybe this. Not too many 1080p monitors under $100.