The Grand Marche de Dosso is the town's everyday engine, a compact market where traders sell grain, vegetables, cloth, plastic household goods, and the small necessities of road travel. It is not a tourist market, which is exactly why it is worth a look.
Come early, when stalls are being stocked and the heat has not yet flattened the mood. Keep valuables tucked away, bargain gently, and remember that many people here are simply trying to get through the day's shopping, not perform local colour for passing travellers.