I couldn't think of a better way of saying it, so "stuff," it is. The most expensive things? Either way, this is a compilation of most expensive stuff I have come across recently, all for folks who don’t know how much a gallon of milk costs. The consumer goods are all in-production and available to buy. No esoteric vintage, gold-plated speculums here. These are also available for private ownership. I am sure a US aircraft carrier could be considered one of the "most expensive," things so I have discounted stuff like that. They are in no particular order, although I have left the most expensive "thing," to last.
Most expensive motorcycle
The Ecosse Moto Works' Limited Edition Titanium - $275,000
World's most expensive bike
Moto Works Titanium
$275,000 Bike
Yes, you read correctly. Two hundred and seventy-five grand - for a bike 
The world's most expensive motorcycles.
Most expensive motor car
I will just deal with cars currently on the market, although some vintage cars are fetching silly prices. The Bugatti Veyron 16.4 - $1,192,000
World's most expensive car
That certainly is a pretty car, but more than a million dollars for a car? Holy crap! Not only is it the most expensive car in production, it is also the second-fastest car in the world. 265 mph.
265 mph Bugatti Veyron
After testing on the salt flats
A clean Bugatti
If you have a thing for cars, here are some useful links:
Most expensive cellular phone
The GOLDVISH "Le Millions" - $1,200,000
Goldvish Le Millions cellphone
If you though $1 million plus for a car was expensive, this thing makes the Bugatti Veyron look decidedly cheap. Apart from the 120 carats of diamonds set in white gold, a pretty ordinary phone. That makes phone calls. It is not as though you get your own private cellular network or anything. Exclusively for those with more money than sense. At least you can scare yourself shitless with the car. This......... Why?
Most expensive laptop computer
The Bentley Ego - $20,000
Bentley Ego Laptop
Styled to look like a purse, the Bentley Ego is a fairly pathetic computer with the handle from a Bentley motor car for carrying. Hard to imagine a more worthless piece of junk, although I am sure they sold a few - The Twenty Thousand Dollar Purse
The Most Expensive Private Jet
The Bombardier Global Express XRS ultra-long-range business jet - $44,000,000
Bombardier Global Express XRS
Now we're talking. Serious money. Tavel in luxurious comfort - at a price.
Global Express Cockpit
Global Express Interior
I also have to add the private Airbus 340-600 -that was recently purchased by Saudi Prince Alwaleed bin Talal - price $319,000,000 - he reputedly paid Edése Doret Industrial design at least $150,000,000 to fit out the interior in a style befitting the owner of a country. You can't really call this a normal production toy, but Airbus think there is a market for between 3 and 5 of these private versions. These are a few shots of the proposed interior.
Soft drinks only in the bar?
Living room
Dining room
Most expensive private yacht
Luxury Yacht
Rather difficult to be certain in this category. Most private yachts are a one-off, built to order. No certainties, but this one is definitely a contender for the most expensive. Designed by Phillipe Starck, and painstakingly tested and built to the most exacting specification, the Sigma SF-99 or "A" is my bet. $300,000,000? ish
Most expensive private island
Vatu Vara in Fiji - $40,000,000
Vatu Vara Island
Vatu Vara island is actually for sale.
Nicknamed Hat Island for obvious reasons, the island has been for sale for some time now. Or perhaps the credit crunch is affecting even these hallowed markets? There is a good guide to private islands here.
After all these, I also found a few silly "Most expensive things." Here they are:
Most expensive bikini - $30,000,000
Diamond bikini bottom
The top
The full bikini
Excuse me if I overdid that, but I am sure you understand.....over 150 carats of D Flawless diamonds, including a 51 carat D Flawless Pear Shape, a 30 carat D Flawless Emerald Cut, a pair of 15 carat D Flawless Rounds and a pair of 8 carat D Flawless Pear Shapes all set in platinum make this one of the silliest things ever created.
Most expensive Hamburger - $99.00
The $99 hamburger
Ninety nine bucks for a burger? DB Bistro Moderne sell their "Burger Royale for this. Why?.........
OK, enough silly ones. If there is anything I learned from looking at the "most expensive whatever," it is that having access to vast amounts of money in no way guarantees taste. This last one is a perfect example. Mukesh Ambani is building,
The World's most expensive home - $2,000,000,000
Antilla - Mumbai
Now, there are some who would say that building a 2 billion dollar home within sight of the largest slum in Asia was the height of bad taste. And I would have to agree with them. But when you inherited this much money - who cares?