If you have leftover bills from your last trip or a stash of "just in case" cash, there are several places where you can sell foreign currency back for your local money. Best Places to Sell Foreign Currency Money Box Myeongdong Main Branch
Best places to exchange currency without paying huge fees - Wise places that buy foreign currency
Moneybox exchange, reliable currency exchange, USIM cards, and luggage storage services. If you have leftover bills from your last