Had two toy purchase disappointments of the year and they were entirely QC related. I finally got around to buying a headless horseman from Figura Obscura through a seller on eBay and, out of the plastic-wrapped package, his leg fell off and never stayed on. I WAS able to salvage some joy by using the pumpkin head on another body and converting him into a running NPC in my long-running D&D campaign world, but my god was that a bummer when that leg hit the floor.
I also had buyer's remorse for Jessica Aster because I still can't get the neck/head onto the second body, so basically I paid for two figures and did get ONE working figure, but that dud body feels like such a vast waste of money. I'd pay someone to fix it for me if I could find someone who could get the neck and head to connect to the body.
It's always the expensive stuff that bums me out. I can write off a dud Legends figure at 25 bucks and just be miffed, but once you get to twice that or above I get really depressed about it.