Edit: Sorry, looks like the deal is over. However all the links below will take you to the companies latest pricing of these types of cards. Looks like regular cost of 4/4 recycled cards is $104 for 500 cards.
I have been designing a business card for my wife’s new venture and I got a requirement of 
making the product a) Green and b) Cheap. I know, polar opposites. It seems the more ‘green’ you are, the more expensive it becomes. So I started my search via Goggling around.
I was fortunate enough to encounter Wizard Graphics, Inc. out in Chico California in my research. They offer a special deal on their website for a 1000 4/4 color business cards printed on recycled paper with vegetable oil for the introductory offer of $25!!
You can find them here:
Main Website
Business Cards from Recycled Material
Special Deal Link
Template Links
-JT