Out of bank space?
Bank space is a problem for most players and a lot of stuff is collected when doing quests that has no further use once the quest is finished. I am by nature a hoarder and reticent about getting rid of anything that may be useful sometime. So how much useless stuff do you have? How many items that are collected just to use during a quest and not needed again? Look at the books and then keys for a start. Use tip it as a reference and get rid of the junk, you will find most of it is not tradeable so just drop it! I did this and recovered two whole lines of bank space!