Graded PS4, is it worth it?

[Random_Matt]

Anyone bought a Graded PS4 before? Am considering one, however, are they dust free and has the thermal been replaced etc.

http://www.game.co.uk/en/graded-product-playstation-4-500gb-console-849556?categoryIdentifier=737200&catGroupId=

Quite sure they are sold globally, savings would go towards a 1TB SSHD and so on. I'm a very frugal person, don't judge.