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In page Merchant:

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In antiquity, exchange involved direct selling through permanent or semi-permanent retail premises such as stall-holders at market places or shop-keepers selling from their own premises or through door-to-door direct sales via merchants or peddlers.[citation needed] The nature of direct selling centred around transactional exchange, where the goods were on open display, allowing buyers to evaluate quality directly through visual inspection. Relationships between merchant and consumer were minimal[10] often playing into public concerns about the quality of produce.[11]