sayonara sale; pre-departure sale
A sale of personal belongings held by someone who is about to leave the country, often to return home. The term is used in expatriate and international student communities in Japan.
I bought furniture cheaply at a sayonara sale.
I'm returning home next month, so I plan to hold a pre-departure sale.
Compound of 帰国 (return to one's country) and セール (sale), a straightforward modern coinage.