We used to have a peanut processing plant here in my town. They had milar bags of chopped peanuts. I bought one about 5 years ago. I think I remember asking the lady how long they would last and I think she said 3 years. There is no date on the bag and they have not been opened. It's quite a large bag and I don't want to open it unless I can use most of them. Do you think they would still be good?