So for the sake of expediency, I was wondering if Zael's gather information roll would be enough to have them track down a bison (https://www.d20pfsrd.com/bestiary/monster-listings/animals/herd-animals/bison) to buy? They're usually listed as 50 gold in the animal (https://www.d20pfsrd.com/equipment/goods-and-services/animals-animal-gear/) equipment section. It'd probably be better for the game overall to just skip roleplaying them going through the market and just buy it offscreen.