There is a bill of riyal currency that is still used in the market, but it has become scarce in the market as…

There is a bill of riyal currency that is still used in the market, but it has become scarce in the market as it is replaced with coins. Some keep this bill by buying it as it is a rare bill and no more issued. For example, one might sell (100 riyals for 130 riyals), knowing that if these (100) were exchanged in the bank, their price would be (100) riyals, bearing in mind that recently the issuance of currency is stopped in that it has not become a rarity yet. Is it permissible for the seller or buyer to sell or buy them for an amount higher than their actual value?