I am currently preparing my first larger game after transitioning from Pathfinder 1e to 2e and stumbled upon the topic of runes.
The way I interpret the rules (specifically CRB page 580), it is assumed that PCs will no longer usually find specific magic weapons and armor along their adventure, instead they'll find runestones with magic runes that they can transfer onto their existing items themselves. However, as clarified in the section about the etching process, they need to meet the rune's crafting requirements (for +1 fundamental runes that means at least expert proficiency in Crafting and the Magical Crafting feat) to do so.
Is it be reasonable to assume that any party would at some point include at least one member who meets their etching requirements? If not (probably even if so), wouldn't it make sense for there to be people who agree to be paid for transfering a rune either from a runestone onto an item or between two items? What would be a reasonable rate for this service?