Thanks for the comment Frank.
Not sure where have you seen it, but at their site it sells for 30 euros plus shipping:
https://www.nuts-bolts.de/volume-41.htmlFrom top of my mind, this price is in line with other books from Panzer Tracts or Panzer Wrecks series and personally I would not define it as "outrageous". However, I understand that whether something is expensive or not is a personal perception affected by many variables, that is why I tend to avoid any mention of price on a review.