Roadkill Garage gets the Crop Duster in the 10's!

According to this, he is 53:

David Freiburger (David), 53 - Burbank, CA Public Reputation Profile at MyLife.comâ„¢

And yeah, there are online sources saying he is in his seventies, but I don't believe them. I know what 75 looks like, and he ain't it.