Frontier Natural Products is a large supplier of bulk organic spices. They provide fresh spices sealed in foil packaging at great prices. For example, you can get a pound of organic black peppercorns for $12.
About their company, Frontier says:
As the world’s largest global supplier of organic herbs and spices, we hold a leadership position, not only in the marketplace, but also in the effort to convert food producers to sustainable farming and production practices.
Here is a page with much more detail about their production process.
Available from: Amazon
Mountain Rose Herbs also provides excellent prices on organic and conventional bulk herbs and spices. (A spot check shows their peppercorns at $7.25 a pound.) I’ve always found their service to be spot-on.
Looks like a good company!