kropotkin goes on at length about how communist scrip of whatever kind runs the risk of duplicating money problems and so on and i am on board for the most part, but:
how is his proposed system of volunteer-labor for specialized goods and wants ultimately different? if you want a telescope you go talk to the people who do telescopes and trade some quantity of free time in their service until you have done a telescopes worth of service for the local astronomical society or whatever. seems reasonable.