I have a media/file server in my basement made out of old computer parts. I had to do a power down restart for some software upgrade earlier this week, and I had problems getting it to come back up. It's power button was sticking, and I ended up having to take apart it's plastic face plate to get it up and running with wires hanging out the front. That's OK for a quick fix, but for the long term, that just won't do.
$20 + free shipping from Amazon, and I've got a shiny new mini-tower case for it. This is the new case with the old internals moved into it, complete with totally unnecessary dramatic lighting.