Buy one, get one free

買一送一（英語：Buy one, get one free）是商業上常見的一種促銷活動形式，在市场营销中以首字母縮略詞BOGOF而眾所周知，但此類的促銷也可能會因為商品有效日期較短而被受批評。 第二份半价 第三份半价 用一定的价格买三件东西 新产品免费试用 反季特卖 Wallop, Harry. Food

need an invite to buy a OnePlus One?. OnePlus.net. [2015-11-10]. （原始内容存档于2016-03-04）.  Get ready for the first OnePlus 2 Open Sales! - OnePlus Forums. Forums

August 11, 2020 [August 11, 2020]. （原始内容存档于2021-01-26）.  Kerr, Chris. Buy-one-get-one-free sale helps Risk of Rain 2 attract 650,000 players in first week.

[2013-09-14]. （原始内容存档于2014-01-30）.  WWE Stars Lana and Rusev: in Russia we buy house together...before marriage. TMZ. Time Warner. 2015-03-01 [2015-03-01]

supports cross-buy. Nintendo Everything. 2015-01-14 [2015-01-14]. （原始内容存档于2015-02-19）.  Tatiana Morris. OlliOlli hitting Wii U, Xbox One and 3DS in March