I've bought Sacajewea at Kobo, using a 35% coupon, for €5.49.
While I could have bought it at Amazon.com for €4.59, I saw more than one comment which made remarks about very bad markup of the Kindle version, so I didn't dare it. Also, the Kobo version is an EPUB source, which I prefer.
It's indeed a huge book. Counting at 2400 characters per page, which is about as big as a normal paperback *without the whitepace*, it comes in at 1216 pages.
Comparing with some other, probably more well-known books, using the same count, to give you an idea:
Gai-Jin: 1246
Whirlwind: 1224
Sacajawea: 1216
Musashi: 1196
Taiko: 1166
It: 1129
Shogun: 1124
Books of that size, in hardcover (my hardcover version of Musashi is 920 pages) would cost around €29, so I think €5.49 is a fair price
This book has moved to near the top of my to read list.
I'm now filling in the blanks in my Terry Brooks reading (I never read the newer books, such as Running with the Demon, and the newer Word-Void-Shannara connection books), and as soon as I finish or tire of these, I'll be reading this book.