sell down the river

cry someone a river

To weep profusely or excessively in the presence of another person.

I have a bridge to sell you

An indirect way of expressing that the addressee is gullible.

pass the river

To die.

sell bargains

To make saucy (usually indiscreet) comments; to come onto.

sell dearly

To make one's opponent pay a very high price to defeat or obtain (a person, unit, vehicle, or territory).

sell down

To betray a person; to conspire against someone for personal gain.

sell ice to Eskimos

To persuade people to go against their best interests or to accept something unnecessary or preposterous.

sell like hot cakes

To be sold in large numbers quickly.