Another great refurbished deal on a desktop is the HP 8300 Elite. This one also has a core i5, 500gb HDD, and 8gb RAM. But is a bit more expensive at $188.88. Like Dell, HP has a pretty good reputation with Linux compatibility, though not quite as good as Dell. Luckily these days, most desktops with built-in graphics have little trouble with the Penguin.
Older model Macbooks are another great choice for Linux media production. You can pick them up for a fraction of their original cost. Macs have beautifully designed hardware and are durable for many years. The 2012 Macbook Pro can still be purchased on Amazon for $889. This model sports a Core i5, 4gb RAM, and a 500gb HDD. Though they are not quite as easy to setup using linux, and sometimes there can be challenges with wifi, boot sectors, or video drivers, but even with all of that, once setup you can have a very high quality Linux machine.