Edited.
The start of day items, as you guys have guessed, are subsidized for a better rate if you can predict ahead of time which items you will need and make duplicates. Plus, the alchemist gets a class feature that adds extra resonance and scales,

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.
(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.