Auction house - can't sell certain items

There are items that you can't list in the Auction House for seemingly NO reason, giving the message "This item is not sellable!". Here are some examples Stick Arrow Bone Bucket String This also affects some much more valuable items (I assume some of these, if not all are meant to be sellable). NOT a complete list Elytra Dungeon pass Infinite buckets Bucket refill Creeper egg