Before patch day I bought 8 of each "Pirate's" item for 2 character's 4 retainers, and 2 more to hold onto. I paid on average 500 gil for them and about half of them sold within hours of the patch going live for 25k a pop. However the remaining 6 or so dropped to 8k since people undercut so badly, even on items clearly in demand. Since the items were unique, I couldn't just easily buy them all up and resell them. I still got rid of all of them and came way out ahead, just annoyed that people suck so much at making real gil.