I missed something in the original post on this subject.

Apple’s wallet friendly Mac Mini desktop computer falls within the range of my definition of moderately priced computer.

If your not familiar with the Mini — it is sold as a small (but powerful) desktop tower only. You have the freedom of choosing whatever peripherals suit you.

For example:
Mac Mini — $599.99
Flat screen monitor of your choosing — $150.00
USB Keyboard + mouse of your choosing — $50.00
——
Total cost: $800.00