It can be quite expensive to buy cut up chicken in the grocery store. When whole chickens are on sale at my local grocery store, I usually buy tons of them and just cut them up my self. I can them just freeze them for cooking later. You can really save a bit of money once you learn how to do it yourself. It may gross you out at first but you’ll get used to it. Just make sure you have a good sharp knife and be very careful. Good luck!