Sidenote: edo treasure cuts in half ammount of seals required for itachi when compared to kage treasure. In edo you get 1-2 itachi frags every ~30 pulls instead of every ~60, which results in 1200-2400ss needed instead of 2400-4800, so technically you can get him without spending as well, you'd just have to hoard seals since the beginning and dump them into edo.