So they tried to keep good old customers, but avoided new ones.

"This man was a pretty good customer of yours a long time ago."

That is a very definite way in which to lose good customers.

But since he's been a good customer, he gets one favor.

He did not know it, but a good many customers would have been surprised if they had seen that room.

They will be good customers long after you and your countrymen are gone.

This system is fairly new, it's in production, and we're very good customers.

They're good customers and not associated with the other groups.

Why would he not have given the plans to his other good customer, Iran, as well?

As a good customer, we are in a strong situation.