The couple put their house up for sale.

Literal

Husband-and-wife [topic-は] house [object-を] sell [purpose-に] put-out.

売りに出す ('to put up for sale') is a set expression. 夫妻 (ふさい) is a formal word for 'married couple,' slightly more respectful than the common 夫婦 (ふうふ).