"Ethical purchasing groups" are an established reality in Italy: groups of people purchasing goods collectively, usually from local producers, to sustain local economy, pay a fair price, and obtain fresh and healthy products. GASdotto is a free and opensource web-based accounting application developed to manage their particular economic flow (quite different from an usual "e-commerce"). The purpose of this talk is to inspire more people, especially outside Italy, to explore this purchasing model and to leverage the GASdotto platform for use in other countries.