I tried ordering 200 cases.... But even in this case it's an insane amount for shipping isn't it?
I don't know how heavy 200 cases can be? Maybe the shipping is really that expensive?
A parcel weighing let's say 44 pounds would be 200 cases maybe... if one case is 0.22 pounds....

From the USPS site that would be an shipping cost of
Airmail Parcel Post 4 - 10 Days $152.05
Economy (Surface) Parcel Post 4 - 6 Weeks $57.05
That's not cheap but nowhere near 270 dollars?

Hmmm..... I don't know.....
Regards Sebastian