Something they can agree on. Dabi prefers being self sufficient, not wanting to rely on someone or share with them what he has, unless he specifically chooses to do so. Doesn't mean he won't mooch off someone else if he feels like it. Selfishness has a way of doing that. It's rare he ever goes "shopping" with another person.

"Ah. No wonder." Dabi heads towards another stall again. "The Luminerium trades medical supplies for the plants they use to create them. Don't expect an even trade. Take more plants to make the stuff." One of those things where five plants equates to only a small bottle of solution, for example. Not sure why he's offering the advice... but that's what's happening.

The peddler behind the stall notices his looking and quickly attempts to entice Dabi into trading for one of the clay items, but the scarred man ends up dismissing a need for them and moves back into the main street.