Liz and I had decided it was time to buy our own airplane. After rejecting an ugly, green Cessna 210 in northeast Ohio, we headed home. Just north of Columbus, I noticed the vacuum gauge was reading zero. I looked at the attitude indicator and the heading gyro, and both started to tumble. We were having a vacuum pump failure. Fortunately it was severe clear, and the incident was nothing more than a little entertaining. This would not be my last vacuum pump failure.