You didn't say if area was important to you, but in Tucson there is
a fantastic service that I have recently checked out thoroughly. They
have many old accounts - including handling the world-famous Canyon
Ranch Spa's product fulfillment for the last 7 years (and I know the
owners, who are EXTREMELY picky about quality of customer service).
The warehouse is spotless, the system very tight, and they offer a
total link with web sales, 800-number sales, etc., so you just
drop-ship your product and they do the rest. They'll answer the phone
saying your business name, too.
Fulfillment Services Inc.
526 E. 16th Street
Tucson, AZ 85701