Topic summary
Buy one, get one free

"Buy one, get one free" or "two for the price of one" is a common form of sales promotion in which a second unit is sold for free only if the first unit is bought at full price.
Topic summary

"Buy one, get one free" or "two for the price of one" is a common form of sales promotion in which a second unit is sold for free only if the first unit is bought at full price.