@ctctw7 Yes! Chicken hearts has been one of my favourtes growing up (Eastern European), I always buy them when I see them. Just cut those nasty stuff off the ends (cats and dogs love it), they don't clean them here properly.
I also love liver, but I ... have trust issues with the NZ livers, something is off..? I still buy them sometimes, but rarely.
Also, I buy bones, chicken frames, for soup. Super cheap, all you need to do is throw them into plenty of water, salt and onion and simmer on low for like 3 hours. Of course you can add more veggies (soup veggies we call them but you don't have them in NZ (except carrot), you have to grow them if you want them here, what you sell here for soups are not it). But even just the bones and onion with seasoning is enough for a basic broth. It won't be fatty/"gelatine-y" (don't know how you say that in English) as it would be if you used whole chicken or bigger bones / more fat, but having a lighter broth has its perks too.
And chicken frames still have enough meat on them, you take them out of the soup once the soup is done, refrigerate, and it's a great snack when you are watching Netflix or something.