Just a quick gold tip that might not last long!
I just now bought what I thought was a very cheap Ace of War, but turns out, it was Ace of Warlords instead.
The "...of Warlords" cards show up when searching for ANY of the "...of War" cards, unless you search for exact match. Might be a good idea to put up a few semi-expensive Warlords cards to see if you get lucky from someone being inattentive (like I was).
Have fun!