실망한 김씨가 반품하려고 보니 받을 땐 '무료 배송'이었지만 반송할 때는 구매자가 반송비용을 부담해야 했다.
As disappointed Mr. Kim tried to return it, it was "free delivery" when he bought it, but when he returned it, the buyer had to pay for the return.