216k isn't too much if the car has been well maintained and driven responsibly. It will go another 100k+ easily, granted you continue the upkeep. My friend has 270,000 miles on his 90 CRX, and it runs and drives flawlessly. His g/f's 92 Accord is at 240k, still going strong. 164,000 on my 96, and I know I'll have it for another 150,000...

Compare it to other 5th gens, does it look/sound/drive the same as the others? If it looks worn out and the engine doesn't sound as healthy as others (w/ lower mileage) I would avoid it. 216k can be A-LOT on a car that someone just drove, and never serviced it on a regular basis.