It’s simple. How many people are on the boat?I assume you're replying to the other poster about "gouging", since I never used that word. I said they were pricey...which they are.
I've found several other La Paz dive shops that offer the same trip description for $150 or less. Unless they are all providing sketchy/sub-standard dive services, they're 25% cheaper than CE, which adds up for 2 divers over multiple days.
CE may provide a unique dive experience that the others don't, but I'm not seeing it from the description.