holy crap! does that guy have any more he's trying to get rid of?!?
what's the mileage?
if it's past 175,000 it's most likely due for a clutch replacement. the timing belt is the next thing that comes to mind.
other than that, they're tough cars, so I'm unaware of any particular 'trouble areas', besides your standard used car stuff i.e. spark plugs, wires, oil+filter, brake wear and overall visual inspection for leaks.
I'd probably keep one, and fix the other up nice and pretty and sell it.