Say you are selling your car and the prospective buyer wants to test-drive it, will you allow him/her to test-drive?

I'm asking this coz, most of the prospective buyers are dismayed when I tell them that I do not allow test-drive to eliminate any hassle when something (as in accident) happens during the time he/she is test-driving my car.

The most I can do is drive my car myself while the prospective buyer sits on the passenger seat.

What's your take?

By the way, I am not a buy & sell agent, I am an individual selling my own car.