I typically buy only chicken parts rather than the whole chicken - for some reason whole chickens seem a bit pricey in my neck of the woods. They want about $8-$9 for a whole chicken at our local stores, whereas I can get a whole pack of like 6 thighs or 6 drumsticks for like 1/3 to 1/2 of the price depending on the sales and markdowns. Plus, when you are looking at it on a per-pound basis, you also have to take into consideration part of that weight from the whole chicken is a lot of the carcass that you wouldn't be getting in a pack of individual chicken parts, along with extra skin and perhaps the neck and gizzards if they threw those in there too. Those are not necessarily the most desirable parts to begin with but you're still paying for them. Plus it kind of bugs me to pay $9 for a raw chicken, when I can get one nearly twice the size, cooked, for $5 at Costco.
I can definitely eat at least half of a whole chicken, if not a whole rotisserie chicken, when I get it home from the store. I'll eat almost half of it as my meal, then end up snacking on the other half of it throughout the rest of the evening.