Moneysavingmom.com compiled a list here of her stockpile price for a lot of items. Most of these seem pretty close to what prices I see around here. I feel like her milk price may be high and her butter may be too low, but for the most part a lot of the prices she references sound very realistic.
I don't buy bagged chicken breast, but my price point for boneless skinless is $1.99 or less I really stock up at $1.79 or less.
Recently I have started buying bone in chicken for around $0.99/lb and cutting that off the bone. Cheaper and I use the bone to make soup. Yum.