Modded Item Rarity?

[kwang4]

So I made a simple drug that's basically like Luciferium, but also heals wounds on the fly. My question is whether there is any XML property that makes it less likely for raiders or traders to have this drug and less likely for raiders to be high on it, as I made it hard to obtain for colonists, and it would be unbalanced to have it be super common in the rest of the world.

[Mehni]

for traders, market value. Other than that, hardcoded values in the StockGenerator. Raiders will only generate the drug in their inventory if they're addicted to it. They'll have 2-5 of 'em.

Both traders and raiders will respect tech levels and not generate with drugs that are beyond their faction tech level.