You're about to get a peek inside the priciest homes in America. When these gems make it on the market, a small group of real estate brokers are hired to sell them. And there are tricks to that trade.... See More
You're about to get a peek inside the priciest homes in America. When these gems make it on the market, a small group of real estate brokers are hired to sell them. And there are tricks to that trade. From serving champagne and car caviar to leaving a flashy car in the driveway. Here's Paula Faris, for our series, "Realty check." You have the infinity pool. Insane. Reporter: From the palaces of L.A. To the penthouses of Manhattan. Like, oh, my god. I paid $30 million and I'm so happy. Reporter: Luxury living is back and more expensive than ever. Mansions in Los Angeles and greenwich, Connecticut, each sold for more than $100 million. Shattering records. And this legendary Beverly hills estate is still available. For anyone with $135 million to spare. Very exciting time to be living in the high-end. It's like the Dow Jones, who knows how high it will go? Reporter: Brokers catering to high-end clients in Hollywood. The architecture is stunning. Reporter: And New York City. Took us inside their most exclusive listings and showed us the art of the big sale. Today, I have a really important client flying from out of town. A little more conservative. I will put on a tie. Reporter: He is a real estate broker who specializes in ultrahigh-end homes. That's when he's not moonlighting on "The real housewives of Beverly hills." Thank you very much. Reporter: His wife is housewife Kyle Richards. The real estate agency he runs is called simply the agency. I sold houses to absolutely everybody. To extraordinarily high-end celebrities, whether it be armed schwarzenegger or Heidi Klum and seal. Big stock guys. Gurus in their industries. Reporter: This 16,000-square-foot estate in los Angeles is for sale for $45 million. Built by Italian developers, it is by some accounts, the most expensive home for femasale in America. A master bedroom with three walk-in closets and 8 1/2 bathrooms. Obviously, we take the client to this house that is an art enthusiast. We brought in the effort of bringing in special art. Reporter: That's his daughter, also a broker at the agency, by his side. We are on boardwalk right now. The opportunity to represent market and sell a property like this, is extraordinarily exciting. Reporter: Tonight, he is throwing a champagne and caviar party. Not for the high networth buyers. But for other select brokers, getting a first peek at the house. Have you had any of the caviar yet? I'm vegan. Reporter: And if this is what $45 million can get you in los Angeles, this is what a similarly-priced duplex looks like in New York, where prices are skyrocketing. How much are you paying for the view? A lot. There's very few viewpoints in Manhattan. It could be the rivers and central park, that are priced less. You'll never be able to lose your view here. Reporter: Frederick ekland. You may recognize him from bravo's "Million-dollar listing: New York." And his producer had one of the top brokerage teams in the country. Their ten-person group has done $400 million in sales so far this year. You're entertaining in the great room, you can have staffers coming in and working in the kitchen. Reporter: You're not doing the cooking yourself. Exactly. Reporter: The apartment they hope to sell is in the upscale Time Warner center, next to central park. The price tag, around $35 million. Walk-in closets are very important. Reporter: This is my favorite. This was designed by a woman. Reporter: It's like a bowling alley. It reminds me of that one in "Sex and the city." It really is tough. I would want to verify the tub with my view. With bubbles. And note the positioning of the tub looking at central park. Reporter: Wow. Is this your rub-a-bub tub? They are filling the place with furniture. It's all about creating the right atmosphere. The buyers they expect will be internationals, shopping for a New York City crash pad. If they're from out of town, it's our job to sell New York, and the city and the lifestyle. We get them some tickets. We fly them to the Hamptons. We're selling a lifestyle. Reporter: And is all on your dime, correct? All on our dime. Reporter: Their marketing strategy, you have to spend money to make money. Across the country, the marketing strategy includes a ferrari worth more than $1 million, parked outside of a $38 million place, high in the Beverly hills. For this much money, you get to park your car on a lawn. Reporter: They are prepping for an evening event for ferrari owners. We look at ways of selling a house, through its lifestyle, versus of selling a property through its real estate. Reporter: The $38 million price tag includes the furniture and a stacked wine cellar. Although, not the art. Somebody buying this house would be like Leo Dicaprio. I see Leo Dicaprio buying this house. Reporter: Dicaprio has not come in for a tour. Although he has been recently house-hunting in New York City. Frederick said that Dicaprio visited one of his team's listing, a new construction downtown. I want to designing in very specific for someone superduper wealthy. The roof is for the penthouse only. Reporter: Those who are not household names do not get the red carpet rollout. Potential buyers are screened before they can tour. I said no to multiple people who wanted to see houses. And generally speaking, we don't feel they qualify. I had another client who wanted to live next door to Sylvester Stallone. I called up sly and he said he had a stalker. And we were able to cancel it. Reporter: Have you ever been taken advantage of? It's nothing for us to ask for bank statements, letters from accountants to verify there's money in their account. It's standard at this price point. Reporter: It's a high-intensity lifestyle, selling these high-end homes. Everything must be perfect. Reporter: Where a multimillion-dollar deal can hang on a tiny detail. But if all goes well and the sale comes through, the potential payoff is big, for these homes in the $50 million range, commissioner is about 2 million bucks. I think getting the big Numbers is very important. You need to do a few of those a year. You cannot do one. Reporter: What are you driven by? The rush, I guess. When I've been negotiating long time. And I do the impossible, getting the buyer and seller to meet. And I do a high kick. Reporter: It's a rush that can be worth millions. I'm Paula Faris, for "Nightline," in New York. Oh, god. A day in the life.
This transcript has been automatically generated and may not be 100% accurate.