Based on comments made by my peers, I decided to modify my non-fiction ebook pricing system...a little bit.
*Listens to a couple of people running away because he called them "peers."*
I am now using an ebook pricing system based on the following factors:
How original was it? (The more I have to think, the more you have to pay.)
How focused was I while writing it? (Yes, you get to pay more if you want a focused book.)
How advanced is the information? (This is the information-value setting.)
Does it have a lot of diagrams and pictures? (Art supplies cost money; scanning and photo editing takes time.)
How long is it? (Based on word count.)
Note that this does not mean that all my ebooks are going to confirm to this system, but most will.
Based on this new system, Pizza Boxes on the Floor should be priced at $5.99; it would be $7.99 if it was not reprints and I would have been more focused while writing it. There are reasons why it is not priced based on this system---time will tell if those reasons were good reasons or not.
The latest ebook of mine, Five Reasons Why Magic Fails, is priced at $4.99 based on this pricing system.
Of course, having a pricing system opens up the door for critics to claim that all occult writers are only writing for the money. To that I reply, my cats would like to eat (and their food bill is huge, even when they are forced to eat the cheapest store brand). If it is wrong for my cats to eat, then don't pay my ebooks.