Thank you for recommending they check our Ad on DR1. I check the local rental prices and I have not seen anything safe ( we have 24/7 security, by the way) for $300 US per month in Cabarete. (Our ad says starting at $300 US per month. The only way someone can get that price is for our efficiency apartment if they take the chance at showing up last minute and the apartment is available long term.)
From time to time, you might find a place in Callejon de la Loma for what appears to be a bargain price, but you will be staying in what we call "Little Columbia" for all the drug deals that go down. Not recommended.