buy back(redirected from buy them back from them)
To repurchase something (from someone) that one has previously sold, lost, or given away. A noun or pronoun can be used between "buy" and "back." For the right price, I'm sure you'll be able to buy back your old house. Once the dealer realized how valuable that painting actually was, he immediately said he wanted to buy it back from me.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
buy something back (from someone)
to repurchase something that one has previously sold from the person who bought it. Can I buy it back from you? I have decided I need it. He bought back his book from George.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.