be sold on someone—(U.S. coll.) be accepted by a person as worthy:
- When we first moved in, our neighbors seemed cold and unfriendly, but now we are sold on them.
Cf.: be sold on something—be persuaded to recognize the worth or desirability of smth.:
- Parliament, and presumably the citizens, were sold on the idea of creating the Child Support Agency.
be sold out to someone—(coll.) be betrayed deceitfully to smb.:
- He had little support from the English aristocracy who felt that they had been sold out to Rome.