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Phrase(s): buy something at something
1. to purchase something at a particular place or at a particular type of sale, such as a store, an auction, a clearance sale, etc. • I bought this table at an auction. • This was bought at an auction. 2. to purchase something at a particular price or for a particular level of price. • I bought shares in General Motors at forty and a half. • The shares were bought at a good price.
McGrawhill's American Idioms And Phrasal Verbs