奇貨

きか【奇貨】

〔珍品〕 a rare item; a rarity; a curiosity; 〔好機〕 an opportunity [a situation] that promises much gain.

●…を奇貨として taking advantage of…; striking while the iron is hot.

●奇貨居(_お)くべし. You must avail yourself of [seize] every golden opportunity. | Strike while the iron is hot. 【諺】