Should a quest NPC hand money back ?

[ChaosSlayerZ]

I would advise you to get rid of all "cash" quests.
The common practice shows that players continusly mis read the quest text and turn in cash needed in plat, gold, copper, silver, 1 more, 1 less etc. I myself did this dozens of times.

If you want players to spend in X ammount of plat, make quest npc to ask for a Gem which cost that much. If no such gem available to buy normaly- make a new gem and set whatever price to it