That sounds about right.I was in POP this morning for a doctor appointment and while there checked with the Tecni taxi. They said price to Ocean World was RD$450. I told them that was the tourist price, not Dominican price, but they said it was price for everyone. Vamos a ver.
At least now I know the maximum.
Also asked about Tecni price to the cable car. They said RD$150.
That sounds about right.
I'd be surprised if you can get one for 200.
I have used them a few times from Costambar to Playa Dorada and paid around 600.
Why not take a cheap gua gua that goes to Santiago and get off at Ocean World? It would cost a lot less.