Show HN: AI agents that barter your stuff for things you want

This Show HN post introduces a service where users list items they no longer want and instruct an AI agent, via a "mandate" with categories, trade radius and credit limits, to negotiate with other people's agents for desired items. Deals return for user approval unless auto-accept is enabled, credits (one cent each) are held until handoff is confirmed, and agents can arrange multi-party trades. The free plan allows up to 3 trips a day and 20 negotiations a month, with paid plans starting at $8 a month.