The other day I was in a military surplus store and saw some so called MREs for sale. A close look quickly revealed that these were not even close to military spec. The only item manufactured by a government supplier was the entre. Everything else was a cheap civilian substitute. The extras included granola bars and cheap candy. I would not trust these rations for storage. Even though the entre was milspec you have no idea under what conditions it has been stored and for how long. These were selling for the same price as new military spec MREs.
Do some research before you waste your money on cheap imitation rations. Last year I wrote two posts on MREs you can read them at http://preparednessadvice.com/food_storage/336/ on storage life and http://preparednessadvice.com/food_storage/civilian-vs-military-mres/ on civilian versus military MREs..
If you are like me you don’t have a lot of money to waste, make sure you get what you pay for.