I totally understand.
But a few things to point out.
1) the lady did NOT mention it when I called.
2) it was a class "D" airport, not entirely a major airport.
3) the other FBO on the field did not charge.
I understand they have to make money. But somethings you just gotta let go.
I test drove a new car today, considering a purchase. Could you imagine if the car lot charged me $10 for the test drive to "cover their insurance"?