A market was an area were goods were sold.
A market planet where death-dealing was sanctioned was visited by the Fourth Doctor and Leela. (AUDIO: Death-Dealer)
When the Fifth Doctor, Turlough and Tegan visited in 1905 Buzzard Creek, one of the businesses in the town was a meat market. (AUDIO: Freakshow)
After Guy de Carnac's death, the Seventh Doctor took Bernice to a market on Crex. (PROSE: Human Nature)
A Time Beetle temporarily attached itself to Donna Noble in a market on Shan Shen. (TV: Turn Left)
The Eleventh Doctor took Clara Oswald to a market on Tiaanamat during the Festival of Offerings. (TV: The Rings of Akhaten)