Last week the Astor Suite in the Plaza on 768 Fifth Avenue hit the market for $165,000 a month, officially becoming the most expensive apartment in Manhattan. The Astor Suite is a 5,087 square foot 4-bedroom 6-bathroom luxury home. Jurgen Friedrich, the owner of Esprit, bought the Midtown West residence for $25 million in 2007, and turned it around the next year at an asking price of $55 million. We wrote earlier about how more New York residents are taking up an interest in the most luxurious Manhattan rentals. Maybe Friedrich saw the article because now, after three years without a buyer, he’s put up the apartment for rent at its current superlative asking price. We all know luxury apartments for rent at places like the Plaza don’t come cheap, but this story got us wondering what some of the other highest rental prices in Manhattan were. We looked around, and found that rental inventory starts to fall off a little before $100,000, but there are a few places that can compete for the title of "most expensive in Manhattan."