A summary of 7 presentations made at the Katoomba Group's forum: Ecosystems for Sale in an Unequal World. Topics covered include: What are Markets for Ecosystem Services?; Carbon Payments for Biodiversity Conservation; Watershed Payments and Biodiversity, Direct Payments for Habitat and Species Conservation; Biodiversity Offsets, Mitigation and Compensation; Panel Discussion: Ensuring Equity in Ecosystem Service Markets; and Interactive Conversation: Threats, opportunities and next steps.