sell someone a bill of goods, to

sell someone a bill of goods

Fig. to get someone to believe something that isn't true; to deceive someone. Don't pay any attention to what John says. He's just trying to sell you a bill of goods. I'm not selling you a bill of goods. What I say is true.
See also: bill, good, of, sell
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

sell a bill of goods

Deceive, swindle, take unfair advantage of, as in He was just selling you a bill of goods when he said he worked as a secret agent, or Watch out if anyone says he wants to trade bikes with you; he's apt to be selling you a bill of goods . The bill of goods here means "a dishonest offer." [c. 1920]
See also: bill, good, of, sell
The American Heritage® Dictionary of Idioms by Christine Ammer.

sell someone a bill of goods

deceive or swindle someone, usually by persuading them to accept something untrue or undesirable.
A bill of goods is a consignment of merchandise.
1968 Globe & Mail (Toronto) There was no production bonus…We were sold a bill of goods.
See also: bill, good, of, sell, someone
Farlex Partner Idioms Dictionary

sell a bill of goods

Informal
To take unfair advantage of.
See also: bill, good, of, sell
American Heritage® Dictionary of the English Language, Fifth Edition.

sell someone a bill of goods, to

To cheat or defraud someone. A “bill of goods,” in commercial language, is a quantity or consignment of merchandise. Selling it here means persuading someone to accept something undesirable. The term dates from the early twentieth century. The playwright Eugene O’Neill used it in Marco Millions (1924), “Selling a big bill of goods hereabouts, I’ll wager, you old rascals?” Or, in the Toronto Globe and Mail (Feb. 17, 1968), “There was no production bonus . . . we were sold a bill of goods.”
See also: bill, of, sell, someone
The Dictionary of Clichés by Christine Ammer
See also:
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • attend to
  • be out of (one's) league
  • be out of somebody's league
  • be/have done with somebody/something
  • beware of
  • beware of (someone or something)
  • bargain
  • bargain for (someone or something) with (someone)