Does it worth to sell my laptop ?

Question

I bought a Lenovo N100 two years ago for £600, still in very good condition.

What I dis like is size (15.3") now I want a 14", and it doesnt have glossy screen.

Also the battery doesnt last long after this time, I'm using it plugged all time.

Thinking: to sell it for £300 OR to swap it for a Nokia E71 or HTC Touch Pro. Will I have success ?

If I buy a Mac and keep this one as well, its still good investment, thanks for taking time to answer.

*this is not an add for sale just asking for advice

http://shop.lenovo.co.uk/apps/productpresentation/index.php?product_id=IBYA04TJA&nbs_search=C%3D102%26S%3D1015%26lang%3Den-gb%26K%3D%26M%3D%264220v%3DCore%2BDuo%264203v%3D512%2BMB%264224v%3DDVD-Writer

Answer 1

to get a slightly smaller screen isn't really a valid reason to get a new laptop in my opinion, however , for example, a macbook is  very nice laptop, will be infinitely better than what you are used to