A blonde and her car

A blonde wanted to sell her car, but couldn’t find any buyers.
She called her friend for advice, and her friend asked her how many miles she had on her car. “235,000 miles.”
Her friend told her that was the problem. But the blonde’s friend told her that her brother is a mechanic and could put back the miles to whatever she wanted.
So the blonde went to the mechanic and told him to put the miles at 25,000.
Two days later the blonde’s friend asked her if she had sold the car since her brother dropped the miles.
The blonde told her, “Why would I sell the car when there are only 25,000 miles on the clock?”