Bait and switch
is used to refer
to a sales technique in which goods are advertised at low prices in order to attract
customers, although only a small number of the low-priced
goods are available
The classy piano bar next to Maddalena's really sells 11 dishes for the advertised
price at lunch. There's no bait and switch here.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers