3. Sellers don't want to deactivate a listing or set their account in "Vacation Mode", so they price it so high nobody sane would buy it.
(deactivating listings has an impact on future search visibility and other metrics)
(deactivating listings has an impact on future search visibility and other metrics)
This has happened with everything from bottles of tide, to ingame items in online games, it was no suprise it made it to amazon.