I wouldn't get fresh from them, but for dried ingredients and spices, I've had good luck just using amazon. If you pay $79 for the prime membership, there's no shipping on any of it and I know that I've saved much more than that.
http://www.amazon.com/s/ref=nb_sb_ss...%20peppercorns
There's ground ones on the second page
For the ones you have, have you tried grinding a couple and dropping them in water to see if the seeds will sink?