The list-price for my book is at $1,87. I can see exactly this price in a specific bestseller-list (censorship) where my book is in place 16. On all other lists I can look at from my home outside the USA(!) the book is priced at $4.45, thats 138% higher. I can live with the idea that delivery-costs for other countries than USA differ and differ with the size in Kb of the e-book.
I want to be sure however about the price that is charged in the USA (and other countries, other than my own).
I want to look at consumer prices from a seller point of view. While promoting my book I have to be able to tell readers in other countries what they have to spend.