A house plot. (yada yada gardens and all that)

Housing items with no game benefit.

New egi/fairy models with no alteration to abilities.

Emotes (though honestly these would probably have to be really cheap and/or really spectacular)

Hairstyles

Glamour Gear (Particularly from other FF or SE Games)

Mounts (just not any faster than current mounts)

Titles (Cash Shop Veteran!) - These would also have to be really cheap.

Minions

New customization options for character models.