I like the myriad of ways that I see markets doing and advertising price comparison studies. Just saw a very in-depth one that NOFA-VT did, and I like this blogger’s attitude and take on it. So that brings up a very good idea: if you see a good food blog in your community, contact them and ask them to communicate news about your market to new people interested in technology and food.
In any case, every market should do price comparisons, even if its for internal use only.