Perhaps I spoke too soon...
To me, $18 Million is a reasonable offer for the line. Looking at what they paid for the entire system to begin with (What was it, $50 Million?) and the state of repair the line is in, the deal seems good. Also think what the MMA could take the $18 million and put it towards (Pay off some bills perhaps). They could put this money into the Canada operation (Money maker) and maybe some Bangor area ops. Looking at the situation, I understand the MMA would like to get the traffic from a new railroad up North but think about the alternatives. 1.) The line is abandoned, the shippers either transload to CN at St. Leonard or PAR/NBSR at Keag (I doubt shippers would choose the MMA after this ordeal). 2.) Another railroad gets the line with trackage rights to PAR, NBSR and CN. Granted MMA may lose some or all of the traffic (What little traffic is there now), but the potential to at least pick up some of the traffic still exists. And if you assume that a new railroad such as the NBSR picks up the line, the MMA could lease some of its units to the NBSR to operate the line until they pick up more power. Further, any new company which picks up the line will have to invest money into the line (Potentially negative cash flow for the first few years of operation). The MMA could set itself up to be a partner in this situation, rather than a competitor.
If the NBSR picked up the line, MMA could have an upper hand. Traffic heading west would have to either back track to CN or PAR. The MMA could be an advocate for the NBSR to pick up the line and grant them trackage rights to Brownville Jct. With this, the NBSR would have no need for trackage rights to Northern Maine Junction or St. Leonard because they already have their own CN and PAR interchanges.