I stumbled across this topic which lead me to the idea: https://forum.armbian.com/topic/16426-selling-helios64/?tab=comments#comment-115128   I strip it down to a few notes: create a new sub-forums trade/marketplace where people can offer spare SBCs for trade or sale and can create requests if somebody is willing to sell his board XY To participate users need to fulfill TBD requirements like number of days registered, posts, reputation...