An eMachines T3062 w/keyboard, mouse, monitor for about $250 in 2003. Upgraded with PCI video card and 500GB HD I spent a total of about $400 on it.
It’s been my primary day to day computer ever since, surfing with it right now. Runs 24/7 and is always downloading something. Only time it’s not used is if I’m overseas for more than a week.
I mention it because one of the hard drives is making noise so I’m backing up all the data not already archived.
Not often a computer stays viable for 8 years for people like us (upgraditis).