What a bummer, Doyd. You might want to speak with your agent again and make sure that reasonable estimates of replacement values are not all they expect.
At any rate, to get you started, here is a place where you can view weekly ads for just about every store in every region:
http://www.sundaysaver.com/
Here is Amazon's online grocery for some baselines:
http://www.amazon.com/grocery-breakf...&node=16310101
Netgrocer might be helpful as they have a list making tool you can use to keep track of everything:
http://www.netgrocer.com/
Hope this helps you a little.