sell someone on
Convince or persuade someone of the worth or desirability of something, as in They were hoping to sell enough legislators on their bill so that it would pass easily, or Dave was really sold on that new car. [Colloquial; early 1900s]
Words nearby sell someone on
sell like hot cakes,
sell off,
sell oneself,
sell out,
sell short,
sell someone on,
sell up,
sell-back,
sell-by date,
sell-off,
sell-through