They are not supposed to be able to sell the ROW. If the property is no longer to be used for the purpose the ROW was established, then the property was supposed to be returned to property owners. That's the reason for discontinuance instead of abandonment. To many landowners don't realize they have a right to the property.
If they want to establish a new ROW then they need to start the process over, not purchase someone else's ROW.
Thanks to Reagan (he was great, but not perfect) signing it into law, they can do exactly that.