I wonder how well raisins would last? They are inexpensive and are sweet too. Also probably good for you.
I put some up in glass canning jars with an 100cc oxygen absorber. I have opened them up tow years later and they were still good. I have an advantage that the air here is very dry so things I vacuum naturally have a very low mosture content.
Raisins, vacuum packed
36 months kept at 40°F
12 months kept at 70°F
9 months kept at 90°F
http://extension.usu.edu/files/publications/publication/FN_2005_Harvest-11.pdf