The butler
Most expensive clothing item: laptop- 1800 Most expensive furniture: dance floor piece-2000 Most expensive Igloo: Knights Castle- 5600 (now its 5100)
This Question is rather hard to answer, but I would Imagine the country of Italy to be the most expensive item in Italy.
They both can be as good as each other. You need to pay real money on Habbo to get Habbo credits (Habbo money). On Club Penguin, you need to pay real money to be able to buy clothes, furniture, most pets and attend special areas in parties. I would say that maybe Club Penguin is slightly better because you can get lots of free things when a party arrives. On Habbo, you can't really get furniture for free and have to pay for credits in order to buy things. Also the VIP's and members of the Habbo Club always treat the people without credits badly.
FAH/AC systems are pretty expensive...
If you mean the price of the item, then there are quite a few. The godly mace of the ancients is the most expensive weapon. It cost 1,000,000 coins. The Tentacles of the Overlord is the most expensive cape. It also costs 1,000,000 coins. The last most expensive item that I know of is the is the Pile of Gold house item. It costs 1,000,000 coins as well.
The most expensive fashion item is Marilyn Monroe's "Happy Birthday Mr. President" Dress. It was sold in 1999 with a winning bid of $1,267,500.
A hello kitty purse
T-Swizzle.
The most expensive item is the Wittelsbach-Graff Diamond valued at 23,400,000.
The most expensive Nintedo item is the Nintendo Wii with all it's games and the motion locator
The entree usually, though some deserts can be very expensive.
The most Expensive Item I have heard about is called the "Legndary Foe Cannibal". It can be sold for almost 13 million dollors!