"Shipments" is an interesting concept - I'd need to think about the implications at more length to really weigh in on it. Seems like it has potential though!
What I do want to comment on is the idea of 250-300g for a pack of 50 charges: that price point is at least twice as high as it needs to be for people to use it. Paying even 5g per charge is way, way beyond what people will pay outside of the crafters who have already made it big and are selling their products for large profits: it's a "rich get richer" situation. Crafters learning their trade - i.e., still trying to figure out what they can reasonably make with the seed they were given at character creation - are going to look for the most time- and resource-efficient ways to work. Which, right now, means rats. Lots and lots of rats. Also, trashgull eggs are available for 1/5th the proposed price of these pack charges.
For alchemy or herbalism, wealthy characters might be willing to pay a three-digit price because the upside is a potentially saleable item to recoup their costs, or something useful enough to be worth the price. No one will bother with it for cooking, however, because cooking items have value only for roleplaying purposes, and you can make a spectacular cake for your liege lord out of rat intestines and lizardman scales as easily as you can out of a 250g Supply Pack. I've already risked SC's wrath pointing this out, but I can show the math if people are interested.
What I do want to comment on is the idea of 250-300g for a pack of 50 charges: that price point is at least twice as high as it needs to be for people to use it. Paying even 5g per charge is way, way beyond what people will pay outside of the crafters who have already made it big and are selling their products for large profits: it's a "rich get richer" situation. Crafters learning their trade - i.e., still trying to figure out what they can reasonably make with the seed they were given at character creation - are going to look for the most time- and resource-efficient ways to work. Which, right now, means rats. Lots and lots of rats. Also, trashgull eggs are available for 1/5th the proposed price of these pack charges.
For alchemy or herbalism, wealthy characters might be willing to pay a three-digit price because the upside is a potentially saleable item to recoup their costs, or something useful enough to be worth the price. No one will bother with it for cooking, however, because cooking items have value only for roleplaying purposes, and you can make a spectacular cake for your liege lord out of rat intestines and lizardman scales as easily as you can out of a 250g Supply Pack. I've already risked SC's wrath pointing this out, but I can show the math if people are interested.