An exchanger with a good exchange rate is much better than near Ataturk Square. Rubles are also being changed. The only thing is that they do not change less than 50 dollars / euro, which is not very convenient.
The rate of 3.1 lira to the ruble is indicated at the entrance. They wanted to exchange 6,000 rubles for lira, but in the end they counted 1,860 lira instead of 1935. There was no answer to the question why, and he just threw the rubles back to us. Politeness is straight.