From the UK I use a parcel price comparison service that offers its
bulk-buy contract rates from various courier companies such as DHL
and FedEx:  http://www.parcel2go.com/ 

The service offers quotes anywhere to anywhere [but] is really only
priced economically for from-UK services.  It's well under half the
price of the walk-up rate.  There may be equivalent services elsewhere.
Certainly worth checking out for.

Julian Dyer
UK