it is said that imitation is the most sincere form of flattery. Except when it is used to deceive people and rob them.
There have been replicas made of some of the higher-end Nokia models, in particular the 8800 Sapphire Arte and 8800 Carbon Arte, both of which have a £1000+ price tag on them in the Nokia Online store, and then sold on eBay represented as the original Nokia product being sold at a discount price.
This short guide should help you avoid falling into the trap that scammers have laid for you.
First of all, just look at the price. There's no such thing as a free lunch and if something looks too good to be true then there's a significant probability that it simply is too good to be true. I recently saw multiple cases of people buying what they thought to be genuine Nokia 8800 Sapphire Artes but turned out to be Chinese fakes. One of them said that he paid $450 for his. Purely on that basis I would have left that phone well alone. $450 is less than a quarter of the phone's normal retail price and it therefore cannot be anything but a fake.
Secondly, the photos. Most online auction sites allow photos of the item for auction to be posted in order to give potential buyers an idea of what they're bidding for. Always be wary of sellers who only provide photos that come directly from Nokia's Press Site. You are not seeing a photo of the actual device being sold, you are seeing generic photos used for publicity's sake. Insist on seeing photos of the phone being sold and if the seller doesn't want to send you any then walk away. Obtaining such photos serves a double purpose: firstly you get to see the actual phone. Secondly, you can return the phone as non-compliant if it is evidently not the phone on the photos that you were told were photos of it.
Thirdly, the IMEI number. The IMEI number is a 15-digit unique number that identifies the phone in question. Insist upon having it. Then go to this page, enter that IMEI number, and you will be told...