Since you are shipping directly from Ceylon, the advantage of using the Calculated Shipping option does not come into the calculation.
Many overseas sellers, especially those masters of online selling, the Chinese, have listings on every site in the world. I've seen the same dress from the same seller listed on dotCA, dotCOM, dotUK, dot DE, etc.
The more eyes you can get, the more sales you can make.
I would go further than ypcdennis, and suggest that you list on every English language site.
And if you are able to, have your listings translated for Germany, France, Spain and South America, etc.
It helps when you are listing on many sites to add a Note to each listing so you know which site it is on. These Notes are not visible to your customers.
