Most vendors around Taki-Sarrafon (Bakhowuddin Nakshabandi) and elsewhere exchange money at fair black-market rates. You can also change money at the bus station and with some hotel owners (others will have a money changer who can drop by if they call them). Official exchange booths are at Taki-Sarrafon and Asia Hotel. The latter also advances cash for Visa cardholders, as does Hotel Bukhara Palace and the National Bank of Uzbekistan. Asaka Bank does MasterCard cash advances.