I do not envy You guys at all!
Those prices are ridiculous!
Here (Croatia) delivery services popped up like roots in the garden.
Shipping door-to-door within Croatia costs an average of 7USD for a box up to half a cubic meter.
Not sure regarding the weight though, but 20KG and more don't seem to affect shipping cost.
A coworker bought a motorcycle several towns away and had it delivered strapped onto a wood pallette to his door - payed about 30USD I think, bike arrived the next day after purchase.
Small packages can be sent within Croatia as affordable as 3USD when using the "newspaper stand delivery service" - one must go and get the package from the specified newspaper stand though.
One is notified via SMS when the package arrives at the destination newspaper stand.
Using the official Croatian post office is expensive and quite tiresome due to their non-transparent rules and regulations.
Shipping outside of Croatia gets expensive fast as the package's weight goes up.
Shipping to the US starts at 6USD for up to 100 gram , up to 0.5 Kg is 15USD , up to 2.0Kg 25USD.
For packages up to 2.0Kg one is NOT obligated to declare the packages content nor value!
Larger and heavier packages fall under special regulations and pricing which I didn't bother to find out in detail.