Discount Food Stores Near Onaway Michigan?

I am not sure where Onaway is.......I think up the Eastern side of the state.
There is a store in Bay City Michigan called Blue Knight. I can not tell you exactly where it is either. Call to find out. But they have all kinds of food products (including frozen items). I have only been there once but I know people who go there all the time and buy lots of things at really reduced priced. You do have to watch the expiration dates. If you call Blue Knight maybe they could give you some tips. Or can you do a search online for salvage food centers?