An international bank account transfer based payment processor that I found is Alert Pay.
It is Canadian Based. It requires users to be verified, which will instill confidence with transacting parties.
It comes complete with API integration if you like.
Credit Card based transactions is also possible for the brave - but those preferring more secure, non-chargeback transactions - bank transfers are offered.
To get your FREE account with AlertPay, click on this link:
https://www.alertpay.com/?hr8ZCMa6QOBJpH0tRiiz3w%3d%3dIf you do not mind, I will get referral fees if you click on the link, as I have also gone through a lot of trouble of searching for a true, fully international, western based, stable payment processor alternative to paypal.
Hope this might assist all the Bitcoin OTC customers to fund and economically transfer funds internationally for their Bitcoin buy and sell transactions.