So lately I've observed that when you try to purchase something from a custom npc of FRO and you have too much items/ overweight. It automatically deletes the item that you purchased and takes your tokens/ zenny as well, deleting it. Some NPC's that have done these are, Renter, for the pass and Ticket exchanger, in all its items. Cant it be lile, if your items are full the npc will reject what you wanted just like how kafra does it when reseting stats, saying that you have too much items or you are overweight. :) Just a player suggestion so others wont also get pissed if it happens to them