Some insanely rich person has a prime opportunity to boost their yacht cred. The late Paul Allen’s 414-foot mega-yacht, equal parts Bruce Wayne and Batman in its leisure-adventure capabilities, is up for sale.

All it will cost to buy this gilded behemoth of the seas is $325.5 million.

Never mind that the “Octopus,” one of the world’s largest yachts, costs more than four times what the billionaire Allen once paid for the entire Portland Trail Blazers. This boat has partied with A-list celebs and explored the ocean depths. Here’s what you, lucky new owner, will be getting:

The first rule of buying a boat is that one elevator isn’t enough. There must be a second elevator only available to its owner. The Octopus passes this test, along with an entire private deck that includes a bar, hot tub and al fresco dining area. That extra personal space is key when you’re accessing one of two helipads atop the ship.

Perhaps the new owner can invite Mick Jagger back aboard for an impromptu music sesh. That’s what Allen did when Jagger used the ship’s recording studio to make some tracks in 2011.

The Octopus, which cost Allen $200 million to launch in 2003, is no stranger to the party circuit, having annually hosted soirees with actors, filmmakers and supermodels during the Cannes Film Festival. No need to worry about making the Kardashians double up on rooms: there are 13 guest cabins that can accommodate up to 26.

Other amenities include a swimming pool with adjacent bar, basketball court, movie theater, spa, library and a glass-bottomed observation lounge for spying on some fish.

As for your 63-member crew, which you’ll need to pay handsomely, there are another 30 cabins.

All that onboard luxury does get tiresome after awhile. Fortunately, you can escape the monotony by heading underwater in the eight-person submarine that docks in the ship. If you’re feeling a little woozy after returning to the surface, there’s a hyperbaric chamber to take care of that.

A second underwater ROV can explore the ocean by remote control, and it’s made maritime history. Four years ago in Philippine waters, it helped discover a sunken Japanese World War II battleship, the Musahi.

The ship’s seller, Burgess, says the Octopus has also traveled the Antarctic coast and traversed the Northwest Passage.

Given that maintaining and operating a ship costs an estimated 10 percent of the purchase price, the new owner will need to make sure they don't completely break the bank — it'll take a cool 32.5 million to keep the party afloat.

Greg Keraghosian is an SFGATE homepage editor. Email: [email protected]