What is the oldest form of market in Indian villages?

The weekly markets called haat. Temporary township market called bazaars. Wholesale farms and retail stores in the villages. Markets formed around temples.

The weekly markets called haat.

The weekly haat is a common sight in rural and even urban India. In hilly and forested areas (especially those inhabited by adivasis), where settlements are far-flung, roads and communications poor, and the economy relatively undeveloped, the weekly market is the major institution for the exchange of goods as well as for social intercourse.