Off Grid Properties
The following independent land sellers offer off-grid land (and occasionally houses) for sale across the USA.
Land Buyers Alliance
Not ALL of their land is off grid but they specialize in seeking out wholesale land deals for buyers. They also purchase vacant land.
You can find them at www.LandBuyersAlliance.com
Land.com
Land.com is part of the Costar group. They are a listing site that has thousands of land listings, many of which are off grid.
They can be found at www.Land.com
LandSearch
Landsearch offers land from all over the US via various land sellers. It is a good resource for vacant off grid land.
Check them out at www.Landsearch.com