I have a fellow Navy spouse that is looking for the book called The First Yankee: The Story of New Hampshire’s First Settler.  She saw it on Amazon but there is only one copy and the person is asking $900 and she doesn’t want to spend that much if she doesn’t have to.

I have set up an account on this site. I have bought several books here. They don't currently have a copy on their site. But, if you create an account, you can make a wishlist and they will let you know when it becomes available.

https://www.thriftbooks.com/w/first-yankee-david-thomson-1592-1628--the-story-of-new-hampshires-first-settler_ralph-e-thompson/1548300/#isbn=0914339613

https://www.3books.co/chapters/2  Start listening at 43:30

At the end of this podcast, the host always asks his guests what is their favorite bookstore. He says The Book Thing in Baltimore, MD. All the books are FREE! I don't know how far this is from you, but waaaaaay to far from me to check out, personally. It is open Sat and Sun 9-5.

https://bookthing.org/#home

If all else fails you could probably use interlibrary loan at your home town library to receive a copy of the book to read and then give back to the library. Of course while you have it you could probably copy a few pages of info that you want.

The Book Thing in Baltimore, MD. All the books are FREE!

I've read about this store. I grew up in Baltimore County and would go back to visit friends and visit the Book Thing... but, unfortunately, it's Web site says you are limited in the amount of free books you can take out each day. The limit is only 100,000 books.  Bummer! 

I like alibris.com 

I usually try bookfinder.com if I want to buy something hard to find. In this case they only have the one listing your friend already found.

Also try goodwillbooks.com and also shopgoodwill.com. I've purchased several older out of print and rare books from both of these sites.

I just looked it up on Amazon to get more information about the book and saw there are two paperback copies selling for a much more reasonable $49 and $69.  Both are listed as in "very good condition."  Not sure if any of the seasonal sales will help even more with this price.

I read years ago that these online UBS prices are often set automatically by some crazy algorithm software that surveys other copies of the same title being sold online and tweeks the price up a few cents.  For obscure, seldom requested books they can grow to astronomical prices over time as other UBSs use the same process and, essentially, computers begin to e-compete and the book holder doesn't realize one of their books has become priced out of reach.  When they do realize it they'll reduce the price dramatically.

I was going to recommend, in addition to the other suggestions here, that you have your friend Google UBSs in New Hampshire and reach out to them directly.  Many may be willing to put her on a watch list for the title.  Where it might not be widely available it might be found in regional UBSs. 

I've already PMed Theresa on this topic but wanted to add my own recent experience with a local history themed book that is long, long out of print and has been on my WL for years.  

Last week I made the rounds of most of our UBSs on phone and in person looking for 3 out-of-print books with mixed results.  Got one, struck out on the other two. 

But, big but, here, one of those three books was by the same author as another book that has been on my WL for years.  For some weird reason almost all the UBSs I hit last week had my long running WL book on their shelf where in visits past, they did not.  Weird that the book went from scarcity to everyone's got a copy.  Of course, now the one I had started the book search for is not to be found anywhere.  Go figure.   But, a lesson to never give up looking and visit your UBSs frequently.  

Have you tried the the worldcat.org?...you can probably borrow it FREE!

No way in hell I'd pay that kind of money just to read it...and I'm familiar with this seller, he always gouges the buyer whenever he can...I'd be embarrassed to ask for that kind of money ...yes, the title is very scarce but it is hardly a Collectible type of book that one would pay that kind of money. I've been a bookseller for over 20 years and I would be ashamed to ask such a price!...the market be damned!

Theresa, just curious if your friend ever found that book?  

I second Maurizio's suggestion of WorldCat and an ILL if this is just a book to be read, not kept.  I just checked WorldCat and saw there are a little over a dozen editions spread around the country but most are in NH and one copy in MASS.  

I've resorted to ILL requests several times for getting my hands on a book that has been on my WL for a very long time with no success in finding it anywhere else or were just too %$#* expensive to buy online.  One book I'd looked for for years was about the invasion of brown snakes on Guam, obviously a pretty specialized book, I found it was available at the cadet library at the US Air Force Academy.  Which was ironic as I live next to and work on the Academy.  I was able to request the book from the cadet library through the base library.  BTW, for me, the book was worth the wait and effort to find it, really interesting. 

Albris use to be where I looked for out of print books. Haven't used recently.

This site lists libraries that have it. https://www.worldcat.org/title/david-thomson-1592-1628-first-yankee-the-story-of-new-hampshires-first-settler/oclc/1038159626?referer=di&ht=edition

I second Cyndi's recommendation of Book Finder. They list all the major sellers, like Amazon and ABE.

That is true, but it is mostly used for someone who wants their book to always have the lowest price and so it ratchets down when, say, a friends of the library posts an inexpensive copy.  The huge prices are speculative and pulled out of the air by someone who has the only book posted but I doubt that a buyer would step up.  For example, a few years ago I saw a 1954 book on dressing windows being discarded by a junior college library (offered on the sale shelf for four bits)..  No copies on offer and it could have been ;posted for say, $20.00, not $750.00, and perhaps find a buyer.  

I read postings for several years by used book dealers, finding examples to use when discussing e-commerce in ad hoc reading groups.  About ten years ago a dealer here in S. Cal. shared that he had sold a manual for a very complicated machine (otherwise only of value as a doorstop) for nearly $1000 to a company in France (?).  I was happy for him but that was a unicorn!