This can't be the real price for sure don't you think? Who has that much money anyway to spend on a console. o.o
The PS3 retailed for 1000 Pounds here, but no way the PS4 is for 899, it's probably just a placeholder.
Step one, take your old ps3 and clean it Step two take all games and accessories, and make sure they're clean looking Step three go to the store in the same week as release, and sell it(they'll probably have deals to make you more enticed) Step four you have a PS4. That's how you do it for cheaper. This price can't be official, at least I don't think it could be.