Players are permitted to pool their money to purchase items or spellcasting services for use in the current adventure. If the PCs buy an item using pooled money that they do not use during the adventure, one PC can purchase the item at the end of the adventure by reimbursing the other PCs what they paid into the pool. If no PC wants to purchase the item, the PCs must sell the item back for half value, reimbursing each PC half of what they paid into the pool. The rule against PC-to-PC exchanges does not apply to these group purchase reimbursements.