Actually, just to head that argument off, that's not the way it was done with the ORIGINAL states added before the purchase of Louisiana. In those states the federal government SOLD the land and kept the money!
Later on the federal government purchased every last single acre added to the United States ~ so that land must be sold and the money reverted to the federal treasury ~ not to the states.
Now if a state wants to buy that land, I"d expect market value, not book value!