macbook pro upgrade ram + change batt = $$?

[ikilledbarbie]

hi guys
need some help here.

i have a macbook pro which is around 3 years old give and take
it is laggy as hell and my battery is faulty.

just wondering how much it would cost to upgrade my ram (currently 4gb) and change battery?

or would it be easier to just sell it and buy a new one?
and where and how much would it roughly sell for?

thanks so so much in advance!!

 

[ikilledbarbie]

upzzzzzzzzz
help pls

 

[Gribber]

Apple thread for assistance

its kinda sad when come to recommendation of purchasing a notebook, u see tons of apples supporters recommending apples

but no where to be seen for troubleshooting