Most cost effective way to buy BTC, send it from Canada to Dominican Republic and convert it into local currency?
This is not a technical question. It's more a question about services.
You want us to know all the exchanges - centralized, decentralized, OTC - and also individuals willing to exchange and compare all the prices and fees for you?!
It's like asking where it's cheaper to get strawberries from, without mentioning if it's about 1kg or 100 tons (which means different problems, opportunities and prices).
So, yeah, good luck with that...
As said, if you can find P2P deals, face to face, without getting ripped off, it could be a good option. Transfer price is small if you do it yourself and you know what you're doing. Selling in Dominican Rep. .. no idea at all...