This project was completed with a $200 budget and most mini-fridges will run your $100 or less, but this is a nice addition to any geek's setup. Paying two times as much to be two times cooler? I think it is worth it, just imagine how many ladies you could get with this.
Essentially it is a dismantled mini-fridge placed inside a stripped-out Thermaltake case. Add in a little shelving and, of course, a temperature gauge, for a perfect refrigerato to feed the late-night gaming urges.