I think we should be able to auction off sets of items. For instance, a cool way to make a little cash might be auctioning off "kits" like:
• A "beginning mining kit" that includes a pick, grinder, and notes detailing the best mining strategy and routes
• A "street project leader kit" that costs lots of currants but includes stacks of loam, peat, barnacle talc, etc. that would help someone get to the top of a street project's leaderboard
• A "beautification kit" that includes a bunch of tree beans and Fertilidust
• A "meat fountain kit" that includes lots of piggy eggs and fecundity powder
This would help us be more creative and allow for new ways to make a living in-game.