Okay guys, the plot just took a huge twist here.
We changed the oil pump, oil pan and oil pan gasket (as well as the oil and filter) because he insisted that they were causing the buzzer issue. They didn't fix a darn thing. I drove him to AutoZone, had him buy a $6.99 oil pressure switch, and voila, the buzzing is gone (and so is one of the causes of the car's legendary oil leakage)
Two days later, I see the car getting towed to the office. uh...oh... Turns out that the clutch is fried - I think. It won't move in any gear, it just freewheels, and the clutch pedal engagement has moved near the floor. The car has the cable type clutch.
Co-worker is done with the car and wants to have a junkyard haul it away. He's under the impression that they'll give him $250 for it. He offered it to me for $250 if I want it.
Should I take it?