I can assure you that my clients in areas where it would be a long distance call, use my toll-free number as evidenced by my monthly bill. I can see a time in the future where it will be irrelevant as everyone transitions away from land lines. But until that day comes, I will continue with my toll-free number so my clients and prospective clients don't have to spend money to do business with me.
You have clients that don't have a cell phone?
Seriously...getting an 800 number has never occurred to me.