Hmmm.... The Aerocool case costs $69.99 over at zipzoomfly.
The Antec Three Hundred is a very popular case with gamers on a tight budget. Currently available for $54.99 and shipping is free:http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042
The Coolermaster 690 is another popular case that has a classy look. Currently available for $79.99 and shipping is free:http://www.newegg.com/Product/Product.aspx?Item=N82E16811119137
All of the others I usually recommend cost more. For example, Lancool, which is a subsidiary of Lian Li, introduced a new Dragon Lord series. The top of the line PC-KC62 model with side window can be had for about $99.99:http://www.lancoolpc.com/en/microsite/01/