I noticed this earlier in the week but never got around to posting it.
The shipping rates go down considerably as the number of items you order goes up. Obviously shipping may kill the deal if you order just one or two items but if you are planning on ordering more it is actually reasonable.
In regards to the Space Marine's CE they are very very heavy and I'm sure that is factored into the cost. My order just arrived on Friday and I was actually impressed for once with how Digital River handled my order.