We suggest that procedures of monetarized bidding can facilitate co-operation in Elinor Ostrom type common(s) projects without crowding out communitarian faculties of "self-governance". Axioms securing procedurally egalitarian bidding on the basis of declared monetary evaluations are introduced. They guarantee that all realized changes of a status quo are in an "objective" (pecuniary) sense equally advantageous for all members of the community. Some empirical evidence that procedurally fair bidding can promote communitarian co-operation rather than crowding it out, is presented. The practical scope and limits of procedural egalitarianism need further empirical exploration, though.