4. Apple Mac Mini
Price: $599.00, list
The only desktop to run on a mobile processor, Apple's Mac Mini places fourth for most desktops sold in the month of March. The Mac Mini runs on a 2.5-GHz Intel i5 Core Processor and comes with 4 GB of memory. Of the three versions of Mac Mini, this particular model was the only one to make the list and also happens to be the least expensive.