Currently cheaper than some of my hard cover textbooks, and I graduated in 2005, so I imagine its worse now.
So that is expensive in a absolute experimental sense but not excessive in the book industry as a whole.
Also carpentry project expenses can add up if you make things fancy, so I can imagine spending about as much on the raw materials as loading a wheel with kindles.
Currently cheaper than some of my hard cover textbooks, and I graduated in 2005, so I imagine its worse now.
So that is expensive in a absolute experimental sense but not excessive in the book industry as a whole.
Also carpentry project expenses can add up if you make things fancy, so I can imagine spending about as much on the raw materials as loading a wheel with kindles.