Even celebrities sometimes find difficulty in selling their own extravagant estates - take it from Michael Jackson's Neverland Ranch, which still can't find its new owner. As it turns out, America's most expensive homes are already faced with a limited number of potential buyers, so adding a hefty price tag definitely diminishes the chances of a sale.

However, these homes face much more difficulty when no one from its potential buyers show any interest in the home they're selling. There are still a handful of mega-mansions out in the market, which have been having trouble selling over the past few years.

Take a look at Forbes' own list of America's most expensive yet unwanted homes:

 

1.    Michael Jackson's Neverland

Formally known as Sycamore Valley Ranch, the King of Pop's 2,698-acre compound in Los Olivos was listed last May (minus the amusement park) for $100 million.

The 12,598 square foot, French Normandy-style main house boasts of six bedrooms and nine baths. The property also has three separate guesthouses, a 5,500 square foot movie theater (complete with a stage), several barns, animal shelter facilities, and even a maintenance shop.

Photos: Neverland Ranch / View of estate / Slideshow

2.    Rancho San Carlos, Santa Barbara

Another ranch has also been on the market for quite a while now. Rancho San Carlos is almost 238 acres big, located in the foothills of Santa Barbara.

The home has been listed more than a year ago, with an asking price of $125 million. Apparently, that price tag includes an extravagant reputation: the estate is the largest in Montecito.

Designed by Pasadena architect Reginald Johnson in 1931, the Monterey Colonial Manor features a 29,483 square foot main house, which has over 30 rooms including 12 bedrooms and 13 baths, in addition to 10 cottages, equestrian facilities, and 100 acres of orchards.

Photos: Main house / Interior / Slideshow

3.    Le Palais Royal, Millionaires Mile

Located in Hillsboro Beach's Millionaires Mile, the Beaux Arts-style mansion of Le Palais Royal was first listed on the market over a year ago, however, it was unfinished.

Now that it's complete, the 47,774 square foot home is seeking $159 million, just $20 million more than its original asking price - which is probably reasonable, given that the manse has 19 bedrooms and 21 bathrooms.

The home also has several lavish features: a 120-year-old Austrian chandelier, $2 million grand staircase, 4,500 square foot infinity pool, 26-foot gilded fountain, and the first in-home IMAX theater in the world with a 22-karat gold-lead detail worth $3 million.

The home also has its own spa, bowling alley, go-kart track, ice skating rink, a 492-foot dock, 30-car underground garage, and 465 feet of private oceanfront.

Photos: Exterior / Grand staircase / Pool view / Slideshow

 

4.    Jeff Greene's Palazzo di Amore

When in debuted in November 2014, Jeff Greene's $195 million Palazzo di Amore became the most expensive house for sale. Even after a huge price cut (now seeking $149 million), the 25-acre home remains listed for more than a year now.

The Beverly Hills mansion has a 35,000 square foot main house and a separate guesthouse - making it a total of 12 bedrooms and 23 baths.

Built by Bob Ray Offenhauser and designed by Alberto Pinto, the 53,000 square feet of living space also has a pool, spa, tennis court, a vineyard that can make 400-500 cases of wine every year, and a 10,000-bottle wine cellar (with its own dining area).

All of which is in addition to a two-level, 15,000 square foot entertainment complex, featuring a state-of-the-art DJ booth, 50-seater theater, two-lane bowling alley, revolving dance floor, and laser light system.

Photos: Exterior with fountain / Entertainment complex / Wine cellar / Slideshow

5.    Danny Thomas' Trousdale Estates Home

Touted as the second most expensive home in Los Angeles is the 18,000 square foot villa in Trousdale Estates. The home was previously owned by comedian, philanthropist and St. Jude's Hospital founder, Danny Thomas.

Aside from the seven bedrooms and 10 bathrooms, the home - which appeared in the market last August - also has a ballroom, media room, and a 20-car motor court.

Currently seeking $135 million, the Moorish-style home boasts of gold-leaf crown moldings, ornate tile work, and Baccarat chandeliers worth $2.5 million.

Photos: Aerial view / Main house / Slideshow.