I have been in Delhi and Leh recently and scouted the used clothes bazaar particularly near the jeep stop in Leh and Azad market in Delhi. Although im sure there must be others.
I collect used vintage music tshirts and need people to scout through the gear at the markets and but all used music tshirts found. Typically about 1$ each.
Then organise with me postage to europe.
Pay will be connected to quality and quantity of tshirts found.