Next to this exchanger there are several more, at least 5. But usually the exchange rate is somewhat more profitable here than in the neighboring ones, plus you can negotiate an additional discount / increase if the amount is large enough.
I do not recommend this exchange office, if you are a citizen of another country, have a foreign passport with you. I stood in line until closing for another 20 minutes, I refused to accept it. All are accepted on regular passports.