@omer
that is not a D600. I think its a inspiron, perhaps 5100.
If i can recall, D-series Latitude, doesnt come with blue-trim (as its a business machine)
if you still insist, show us the BIOS Page for its processor Model.
You can get a real D600/D610 (1.73 GHz, 512 MB Ram) for 33k from Lahore easily. Your machine is bit overpriced.