I'm unable to purchase the Rainmaker hairstyle from the Golden Saucer NPC. I get the error that I'm unable to carry more than one of the untradable item, yet I do not have any in my or my retainer's inventories. I do not have the option to use the hair style on my retainers, so I know that I have not already used it. I may have bought it during the last Make it Rain campaign and thrown it away, maybe.