A more apples-to-apples comparison is that if you order conventional eggs from FreshDirect, you'll pay $1.99 a dozen for New England Fresh Grade A Large Brown Eggs and $3.69 a dozen for Alderfer's Grade A Large Organic Brown Eggs. Close to double or, rather, $1.70 more per dozen. Greenmarket eggs, which may or may not be organic (I don't know if they are; I know they're not required to be), are a few cents more than that. As I said before, this isn't so much more for one product but then you have to start going down the whole line: Farmland 2% Reduced Fat Milk 1/2 gallon $2.49; Horizon Organic 2% Milk 1/2 gallon $4.39. And so on. If you start extrapolating that to the whole shopping cart, and to 52 weeks a year, you can be talking about a couple of thousand dollars a year easily. For a household with a $20,000 annual income, that's an unacceptable differential.
Here's some number crunching for Alice
Water's neck o' the woods (SF Bay Area). Prices are the "not on sale" prices from the Safeway website.
1 dozen Grade A Large conventional eggs is $2.99
1 dozen Grade A Large cage free eggs is $3.99
1 dozen Grade A Large Organic eggs (store brand) is $4.49
1 dozen Grade A Large Organic Eggs (name brand) is $5.19
Keep in mind that conventional eggs frequently go on sale, whereas organic eggs rarely do.
1/2 gallon 2% reduced fat milk, Lucerne (store brand) $2.49
1/2 gallon 2% reduced fat milk, Horizon Organic $4.49
1 gallon 2% reduced fat milk, Lucerne $3.99
1 gallon 2% reduced fat milk, Horizon Organic $6.99
Safeway generally offers a sale price on their Lucerne gallons... 2 for $3.99/$4.98 or something like that. My kids go through 6 gallons of milk a month. What normally costs us $12-$15/ month would end up costing us $42/month if we went organic.
I have 4 kids, 2 of whom have food allergies so we do have dietary restrictions. Buying organic everything is definitely not doable unless I want malnourished kids. The only things that I consistently buy organic is my daughter's soymilk and non-dairy "ice cream".
Farmers Markets around here are not cheap sources of organic veggies either, nor would I consider much of it locally grown. Many of the farmers at the markets in my area are coming from 2-3 hours away.