middleman

US /ˈmɪd.əl.mæn/
UK /ˈmɪd.əl.mæn/
1.

người trung gian

a person who buys goods from the company that has produced them and makes a profit by selling them to a store or a user:

:
You can lower the price by cutting out (= avoiding the use of) the middleman and buying directly from the factory.