I think the calculated dynamics bit got to me as well - I’m almost certain (esp. from reading others’ experiences) that items that you need show up less frequently in the marketplace when you need them. So those nails that were so easy to find 10 minutes ago are suddenly super scarce when you’ve got some buildings that actually need them.

So you think “oh I just saw those!” And keep spinning the slot machine wheels of the marketplace. And then when they DO finally appear, that little dopamine hit is all the sweeter :)