pay an arm and a leg

pay an arm and a leg (for something)

 and pay through the nose (for something)
Fig. to pay too much [money] for something. I hate to have to pay an arm and a leg for a tank of gas. If you shop around, you won't have to pay an arm and a leg. Why should you pay through the nose?
See also: and, arm, leg, pay

cost/pay an ˌarm and a ˈleg

(informal) cost/pay a lot of money: We want to redecorate the living room, but I’m afraid it’s going to cost us an arm and a leg.
See also: and, arm, cost, leg, pay