Inside the secretive network fueling the megayacht boom

Getty Images; Rebecca Zisser/BI Tomek Wrzesinski has spent more than 20 years selling supersized boats to the uberwealthy, and he's found one nearly foolproof way to get a client to bite. It starts with sending a cryptic weekend text message: "Maybe I have something for you. I just need to check if it's still available. It's an off-market offer." The last three words are usually enough to cinch the deal. "After 20 minutes, you have an answer: Yes, yes, yes," says the Monaco-based yacht…