Not worth holding onto all of them, imo. Most people who sell Annis barely ever sell them. Most people want 20 stats, or 20 res, and they don't sell for very much unless near perfect. I'd keep the high 10 exp ones and give the rest away for more stash space. That's what I do at the end of every ladder reset, at least.
Good luck.
Thats a good plan. I need to get away all my shared stash to buy Rotw I think. Otherwise I guess I'll lose all my annis in my shared stash ?