Average of $10 a book?

I have owned kindles since 2008 and I have bought and read a lot of books. In all this time I only ever paid close to $10 for exactly one book. That was a 9.99 purchase. The highest after that is 7.99 plus tax. But the majority of stuff I buy on sale. No clue what the average is but I have many books in the .99-2.99 range and those are mostly trad published, not self published. Like I said, I buy on sale. That is what ereaderiq's wishlists are for.
I also buy for 3.99-5.99, but most I think is more in the 2.99 range.
I thought this was suppose to be a poll, looks more like a dig towards people that read a lot of books and buy a lot of books. What is the point of that.
I feel like I just stepped into something odd.......