RPGMemes

Pathfinder 2nd edition's rogue class has an ability chain that allows them to have already bought certain kinds of item, and they declare it while on the adventure already and decide they need it. "Oh yeah, I bought a spyglass when we were in that last town." The lowest level is for adventuring gear-type stuff, and it's usable like once per in-game week. Later tiers of it expand the kinds of items and the frequency. You do also mark off the gold the item would have cost.