Islamabad plates are only good in kpk and parts of punjab as the myth the fly through checkpoints.
Sind plates in Islamabad is police favourite car to stop even if V8.
Lahore plates gets same treatment specially in summer when there on route to Murree.
When selling a non ISB number specially Karachi regd car rust and transfer issues come up thus avoided Punjab disliked also due to fact some have been seen with wrong information on the record such as colour entry by the eto office.
Islamabad numbers are preferred due to tax and file is with eto office so it’s considered safe buy easy to check also it’s a small city so less running around safe drivers so called these days so less dented cars.
Most people living in Islamabad kept isb regd cars and prefer them over any other city regd cars call it a easy feel attitude due to transfer and driving around and reselling is easier when selling in same city.
Kpk people love Islamabad city cars after Karachi numbers being nearby they purchase from Islamabad thus creating a demand and dealers increased price of Islamabad regd cars.
In Karachi not many would want a ISB regd car or Lahore even.