Sell my D90 for a D7000?

I own a Nikon d90 and i love it but i'm thinking of upgrading to a nikon d7000
So is it worth it?
P.S. I know everything about photography already so that nobody tells that if i'm a beginner don't get it

If you know everything, why are you asking this question? I'd keep the D90…

I have a D90, and I'm not buying a D7000 as it is not enough of a jump up in performance and features to warrant it.

Instead, I'm spending my camera dollars on buying new lenses, speedlights, etc as those will increase my capability more than a new camera.

I will not upgrade to a new camera until I have finished with my lens purchases, as the D90 is a decent enough camera… For now.

" I know everything about photography already"

Everything? Then why are you asking this question?

Anyway, even taking into account that you can get quite some money when you sell your old D90, that still will be a net cost of $500 or so. What do you hope to gain by spending this money that your D90 can't do for you? Is that worth that much money to you?

I'd rather put that money into a really nice new lens.