I don't know when you last ate an MRE, but I've been in and out of the Army/Guard for the past 14 years, and the taste and selection has gotten exponentially better the last five years or so. They now have nutritional info printed on the cardboard sleeves over the foil packets.
They continue to be high in sodium.
If you can score some for free, by all means take them. The current market value on a case of MREs will blow your mind, and IMHO is not worth it. If I am going hiking or camping, I put together my own food supply, I would not pay the outrageous prices being charged nowadays for the convenience of the MRE.