Only $100,000 each...plus the cost of adding a room to your house just to display it.
"Earth Platinum, published at the end of February in an edition limited
to 31 copies, is the world’s largest atlas. The book is 1.8 m (6 ft)
high and 1.4 m (4.5 ft) wide. When opened, it spans 2.8 m (9 ft). It
contains 128 pages of maps, flags and panoramic photographs, and weighs
150 kg (over 300 lb). It’s the kind of book you can’t read alone: it
takes two persons to turn over the gigantic pages."
Read about it as Strange Maps.