Well.. stopped playing he game after that one. Why on God's green earth would you force your player to keep all the junk they collect without making SOME indication the item is quest-breaking if lost... OR not provide an alternative (perhaps more difficult) way... OR you could just label it a "quest item".
Keeping items that have a value of 0 is not how most people play games that allow you to collect seemingly endless amounts junk items along the way. The expectation is there's a hint to it's importance or you can retrieve the item later.
Bad choice.
