Car auctions are a pretty common thing these days, even those that feature rare and unusual vehicles, but whole collections are coming up for sale a lot less frequently.

One auction due to take place in the USA in early December must surely be among the most unusual and extraordinary ones to ever take place. Involving what is simply called “The White Collection,” it will see a total of 63 cars come up for grabs—54 of which are Porsches and almost all of them are white.

Curated by one single owner over a period of around 10 years, the collection contains some extraordinary and super rare Porsches that will make the pulse of every petrolhead go faster.

The exact location of this treasure cove hasn’t been revealed, and neither has the name of the ultra-rich owner or why he’s selling all of his toys. But auction house RM Sotheby’s has at least listed details of all lots on its website.

Porsche collectors must be queuing up to snap up some of the vehicles, and the star car among them is most likely a white 918 Spyder. Finished in paint-to-sample Grand Prix White and kitted out with a leather-to-sample yacht blue interior, this 918 is serial number 656 and had over $96,000 (P5.46 million) in extras spent on it via Porsche Manufaktur.

It even features the Weissach Package, which seems wasted on it considering it has covered just 12 miles since it was delivered to this billionaire Batcave. The final sticker price was $1,028,200 (P58.45 million), and it should easily go for twice that at auction.

Other cars that, according to RM Sotheby’s, should hit seven-figure amounts during the event, include a 1993 911 Carrera RSR 3.8, a 1997 911 GT2, a 1994 911 Turbo S Flatnose, and not one but two 911 Carrera RS 2.7 in Lightweight and Touring versions.

If your budget doesn’t stretch this far, then maybe a 1977 924 or a 1990 944 S2 Cabriolet is more your thing.

Other more unusual lots include two red Porsche tractors and a dark red 1953 356 Pre-A 1500 America Coupe. Many of the cars have covered ridiculously few miles in their pampered lives, and you really have to question why someone would amass such a collection of perfect sports cars and then not drive them.

Next to the cars, the auction also includes a ton of other Porsche-related objects, including watches, bicycles, posters, books, clothing, luggage sets, brochures, and much more.

There are even some non-Porsche vehicles for sale, including a 1952 Kleinschnittger F-125 Roadster, a 1940 Ford Pickup, and a hot rod. Just browsing through all the lots really makes you wonder why someone spent all this time and effort collecting them only to sell everything again.

If you fancy having a go at the auction, then register here and be ready on December 1-2 when the event takes place in Houston, Texas.