Just plain old
Ebay
has some aweful good deals if you get stealthy about your activities. I bought some nice matching cases for both of my computers for under $3.00 each. one was $1.68 and the other was $2.86 I believe. and 500 watt dual fan power supplies added for under $10.00
Watch stuff ending first, time IS money they say,so spend some time watching and you can get some great buys on
Ebay
.