I go through a lot of dried beans.
I'm basically price-shopping against my local Fine Fare.
I'd love to buy local-farm dried beans from Cayuga (NYC Greenmarkets), etc, but it's not in the budget.
My Haitian housemate, for example, goes to a little shop up on 181st and broadway. Buys the pintos I get for 1.39/lb for .89.
I'm expecting the best sources to be in "ethnic" neighborhoods.