Computer Cases

duckbillplatypus writes: "I have a small computer store. I sell computers preinstalled with Windows and Ubuntu. My question is 'Does anyone have experience with a quality, sub $50 computer case?' When I say quality, I mean no sharp corners, medium weight steel (not so flimsy if bends when you touch it), power supply that won't catch fire, and inexpensive shipping. I want to provide my customers with a good case while keeping costs down. It is a tough market, when you are competing against the Dells and Walmarts of the computer sales world. Thank you."