You're going to have to pay more than $30 for a case that's respectable in all fashions. The case above is cheap, but airflow is laughable. Antec do good #£100 cases.
answered Aug 15 '10 at 18:01
10-Bay ATX Mid Tower Computer Case w/4.72" Blue LED Fan:Buy here
10-Bay ATX Computer Case
Black color (front panel is a glossy piano-black finish)
10 drive bays
No power supply
Blue LED on front panel
Front panel 4.72-inch (120 mm) Blue LED case fan
Two (2) Side mounted USB ports
One (1) Side mounted headphone jack
One (1) Side mounted microphone jack
Covered drive bays
Front metal mesh
Vented side panels
Seven (7) Expansion slots
Drive Bay Features:
Four (4) 5.25-inch external drive bays
One (1) 3.5-inch external drive bay
Five (5) 3.5-inch internal drive bays
Supported Case Fans:
One (1) 4.72-inch (120 mm) front case fan (installed)
One (1) 3.14 - 3.62-inch (80 - 92 mm) rear case fan (not installed)
One (1) 2.75-inch (70 mm) side case fan (not installed)
Compatible Motherboard Types:
16.6 x 7.25 x 17.5-inches (H x W x D, approximate)
10-Bay ATX Computer Case
This computer case does not include a power supply or power cord.
ATX power supply
Available power outlet
Hard drive, optical drive or floppy drive
The rest of the system
answered Aug 15 '10 at 18:14
when getting a cheap case, ignore the look, focus purely on space and airflow.
Many cheap cases will often have poor airflow,
Due to the shape of a PC case, it is designed for air to enter through the front and the hot air exits through the back. Most chipset heatsinks and after market heatsinks and videocard heatsinks will have the fins of the heatsinks and fans positioned to pull cool air from the front of the case.
The problem with the cases is you will have trouble going $30 or under as shipping is often almost as much as the price of the case
While the case is not something you want to dump too much money into, you want something that will provideo good cooling and above all, a front fan that can cool the hard drives. A hard drive such as a 7200 RPM western digital caviar black or many other high performing 7200 RPM drives will overheat with out direct airflow over the drive.
I have seen this problem a lot with I did repairs on systems that some people built. there will be no fan cooling the hard drive, then they will get me to help them with problems with bluescreening and windows delayed writing problems, it then turns out that the drive was overheating and shutting down to prevent damage.
If possible, I really recommend you save up some more money and get a better case. those cheap cases often use really thin metal that can cause the case to flex if it gets bumped or something goes on top of it such as a cat :)
If you can save up enough, you can get a case like this
ATX specs rarely ever change so get a quality case now that will last you as long as the motherboard mounting remains the same.. Don't get a really cheap case that will put you at risk of it flexing or poor airflow causing parts of the system to run hot (when they run hot, they tend to not last as long which will cost you more in the long run).