Pathfinder books are $1 each in this massive RPG Humble Bundle

Humble Bundle - Gear up your role-playing party for a Pathfinder 2E journey—featuring the six-part Strength of Thousands Adventure Path, Lost Omens: The Mwangi Expanse setting, and Paizo Inc. tomes to power

Essential Character Management Tools for Pathfinder (pay what you want and help charity) : r/humblebundles

Humble Book Bundle – Pathfinder & Starfinder – The Kind GM

Humble Bundle x Roll20 - Roll20 Blog

Humble Bundle: Pathfinder – No Rerolls

Dynamite, Paizo, and Humble Expand Pathfinder Comics Bundle for Charity, Including CBLDF! – Comic Book Legal Defense Fund

PATHFINDER: WORLDSCAPE ONE-SHOT - Grade NM - Re-Animator Humble Bundle

Up Your Monster Lore With Humble Bundle - Must Contain Minis

Get everything you need to play Pathfinder for $5 in this Humble Bundle

A huge stack of Pathfinder RPG manuals are available from $1 in the Humble Book Bundle