Old ladies and used cars

It was a small town and the patrolman was making his evening rounds.  As he was checking a used car lot, he came upon two little old ladies sitting in a used car.  He stopped and asked, "Why are you ladies sitting there in this car?  You trying to steal it?"

"Heavens no," one spinster said, "we bought it."
"Then why don't you drive it away?" he asks.
"We can't drive," the other spinster responds.
Curiosity grips him, "Then why did you buy it?"

"We were told that if we bought a Used car here we'd get screwed - so we're just waiting…"