MNH. The unbelieveable price is for one set of 4 stamps. (Main picture - I just upped the colors to draw attention.)

CV Norwegian Catalog = 21USD.

Shipping cost for 1 item is always 3 USD anywhere in the world, except in Norway, where its 2.5 USD.

If you buy several items, shipping cost for each additional item is always 0 USD anywhere in the world. 

If you have any questions, send me a message. Do not be afraid to ask. 
I am Norwegian and living in Norway, and I have been collecting and trading norwegian stamps for a long time.