What is the conversion fee for International vendors?

Direct bank transfer

When transferring funds to a International bank account, conversion fees are generally around .5%, but can fluctuate based on your location and a variety of economic factors. 
To see what the current conversion fee is for your location, please visit this link. 

We now support direct bank transfers to these countries in US dollars via the SWIFT network! No conversion fee applies. Please note that there is a withdrawal charge of $12-15 for these transactions due to network fees.

PayPal transfer

If you are transferring funds to a PayPal account, you will receive your funds in US dollars and have the option to convert the funds to your local currency for a fee. Note that PayPal has an added withdrawal fee of 2.9%.

For a breakdown of PayPal's fees, see this link