Westy lot of wrong info floating about here pmsl.....
2 owner is good on car like that mate, of that age. AS said 2002 is pre face lift. Just check it out as generally bullet proof. Only reason i ask on age to see if still had warrenty etc.
As said if you only do 300 miles a month i wouldnt worry about fuel etc. They are good complete cars, not overly quick but then you dont expect that, just a fun car.
Just make sure its straight and not been in bump, but im sure you would anyway