The Dapto Community Farm is a not for profit community farm. To fund their organisation they sell boxes of organic fruit and vegies for $29. Some are grown at the farm and some are sourced from nearby growers or the markets. They are very helpful and you can order by phone or SMS the day before. Pick up is from Tuesday till Friday from 2pm. The price is definitely cheaper than anywhere else I've seen and the vegies are really fresh. They also allow you to omit certain vegies/fruit from your selection if you don't like them.
They are situated on an old flower farm and have over a hundred garden beds you can hire to grow your own vegies. They charge a monthly fee for rental of the plot and ask only that you use organic methods. The people involved are really friendly and helpful with gardening advice as well as ideas for how to use any unfamiliar produce.
You don't need to do anything to get great deals, their prices are so cheap.