I remember a couple older crews had a custom crew shop in the marketplace where they posted their members name, and showed examples of their work. A member would then select which member they would like to buy a custom tag from, and give their specifications, then pay the credits to the member (it used to be a fraction of the credits went to the owner to buy resources, but there are no more resources to buy). This could revive the marketplace a bit, and make inactive members more active with what they make. DISCUSS
Those shops wouldn't last long at all, would go good for about a couple of weeks and die off. I know SM started at least 3 of those and they all would die off in a matter of weeks, because most people would forget to check them.
Could work, it would be up to the members if they would want to do this. Doubt any of them would tbh. Ways to make it so it doesnt die out, is get all your members to put it in there signature, that's all. Make sure they are looking.