It certainly seems like publishers are increasingly trying to push the limits of what they can charge. 2 episodes per volume seems increasingly common. This season we also have Sengoku Collection at 12 volumes for 7350 yen each - yes, you have to pay 88,200 yen for the privilege of owning all of Sengoku Collection. I recall the case of Nichijou as well, 13 volumes at 7980 yen each. I wonder how far this will go before it reaches the breaking point.
Sengoku Collection is offering items for the game with the BDs right? I wonder if that will have a noticeable effect on the sales.