You'll pay at least $35 more anywhere else
Need a simple-to-use, quiet computer with a small form factor? The Mac Mini is about as easy as it gets, and today it hits a new low of $530 after a $50 rebate. $530: Apple Mac Mini Core i5 Desktop (MD387LL/A)
Although this is the "base model" Mac Mini, it's sporting a Core i5-3210M processor, 500GB HDD, and 4GB RAM. Just add monitor, keyboard, and mouse/trackpad.