Watch for things like Canned foods, potted meats, ect.
They are usually cheaper at the 'Dollar' stores than at the grocery stores.
Also, watch for 'Closeouts',
Butane lighters, scissors, pots & pans, stuff like that.
Most of it is junk, but every once in a while you will run into a close out of good stuff, like the 'EMT' scissors that will cut a penny in two for cheap.
Really handy to have, and when they are 59¢ a pair or 99¢ a pair you can sprinkle your gear with a set in several places... And they are handy enough to have several!
I ran into a three piece serving set, large spoon, spatula, meat fork made of husky stainless steel (no plastic handle to melt off!) for about a buck a while back.
Good score for the camping gear!
No such thing as too many stick matches, especially if you find the 'Strike Anywhere' kind!
I either use small zip lock bags and separate them,
or I vacuum pack them into small 'Serving' sizes to keep them dry when I'm out and about!...