According to national regulations, notes with 0, 2 and 5 cents can still be exchanged normally, but it takes time to exchange them.

In addition, except for the long-numbered banknotes of 1950' s, the unmarked banknotes of 1980' s have almost no collection value and appreciation space, and the single-sheet banknotes have been out of circulation and cannot be exchanged.

You can sell it in the stamp and banknote markets. Buying and selling is different from exchanging.