i went to ship a 5pc kit w/ woofer to vegas and got an outrageous quote from UPS. granted they had to "build" the boxes, but i found out the majority of the price is in packing materials.
whenever i receive drums, i always find they are stacked inside one another. the rims and any loose mounting hardware is usually wrapped in saran wrap, then shipping paper. t-rods, washers, etc. are all in small ziplock bags.. then a TON of packing peanuts and newspaper.
if you can cover the materials and packing labor yourself, the actual shipping charge is pretty fair. DHL, from my experience, is a good service too.