Seems a little like a old thread but I will give my 2 cents.
My in-laws bought there 1 acre lot for $14,000 about 10 years ago. I bought 2.5 acres about 12 miles from their lot for $10,000. I have been looking for land for my son in MT and I find large lots from 20 acres to 27,000 acres for prices between $1,000 to $10,000 per acre, most of which are miles from civilization while others within city limits run between $10,000 and a couple million just for small quarter acre lots.
All in all, no such thing as a fair price, its just what you are willing to spend.