That's the answer I kinda assumed you would get. Really that's about as specific as most website dealers are going to be. Unless they can give you the exact species name, it's always going to be a bit of a gamble. If it's Indo-Pacific it's most likely not going to be a Vulgaris.... but could be.... possibly. My problem with their Caribbean species is it might be a Vulgaris, it might be a Filosus/Hummelincki, it might be a Briareus, or it might be a Mercatoris. If it turned out to be a Mercatoris (which the picture indicates) I would be pretty freakin upset. Or even still, it might be another species I'm not familiar with at all.
One thing you can be sure of, at that price, it's not going to be a Mimic or Wonderpus, and that is a big relief to me. I believe they actually removed Mimics after some responses they got from members here... or maybe Tony?