Listen to O Roopnagar Ke Saudagar online. O Roopnagar Ke Saudagar is a Hindi language song and is sung by S. D. Burman, Lata Mangeshkar and Pramodini Desai. O Roopnagar Ke Saudagar, from the album Sazaa, was released in the year 1951. The duration of the song is 3:11. Download Hindi songs online from JioSaavn.