Until recently the reselling and vending of water in the developing world has largely been ignored by utilities, governments, and external support agencies. Owners of private connections resell water to customers who come and fetch it. Vendors transport water door-to-door or sell it wholesale. Reselling and vending indicate consumers' ability and willingness to pay for water service. Recent examples and two case studies suggest that these practices can be used as design criteria for utility services, especially for peri-urban areas. While customers may pay more money for less water, they may also prefer paying only for what they receive rather than a fixed monthly amount. Problems with vending and reselling water and issues involved in institutionalizing vending and reselling are discussed. Includes 29 references, tables, figures.