In that kind of situation, I would say screw strict paleo and buy some lentils and black beans ($1/bag). That + eggs and maybe tomato sauce, salsa, and/or yogurt for flavor.
Other than that, supermarket ground beef, chicken thighs, ground pork, spinach, potatoes, sweet potatoes, carrots, bananas, and butter are always cheap. I'd avoid a lot of fresh produce and focus more on energy dense organs (potatoes) and meats. Fatty ground beef and pork would allow you to get around buying any cooking oils.
Last edited by Chaohinon; 06-18-2012 at 06:30 PM.
“The whole concept of a macronutrient, like that of a calorie, is determining our language game in such a way that the conversation is not making sense." - Dr. Kurt Harris