Moving to Dominica Republic

If I buy a villa for $300000 US in Casa Linada, how much is the insurance on that property?

Welcome to the forums. 

Your question is way too vague.  What kind of insurance are looking for?  What deductible?  Covering all risks or only some?

It's like asking how much a car costs - there is a huge range of models and prices.

I sent you a private message...

Please consult an insurance broker.  Goodness.