Depends on location, as always. Average small parcel with water and power is running about $10K an acre. Further out, less. Still can find decent land for $5K, the bigger the parcel, the price becomes less per acre.
Around Kalispell and Flat Head Lake, the Californicators are paying a premium for being able to be cold and complain about hunting. Trust fund babies trying to turn Big Sky into another California. Natives are not too pleased with that.
Sucks to see that. Other than Alaska no other place to run now.