What have your experiences been with Avis? Also I have some queries regarding their terms and condition:
Renter’s Qualification
Minimum age to qualify for rental is 21 years with an Avis honored charge card and valid driving license. An international driving permit is also required for Non Pakistani license holders.
Will a uk driving licence do?
Terms Of Payment
No cash rentals. Only AVIS and AVIS honored charge cards accepted towards payment of rentals. We accept American Express, Visa , Master card and JCB as Avis honored cards.
No. In addition you will need an international driving permit, which can be issued by your local driver’s association (I think in the US or UK they call it AAA).
Apart from that: I don’t think you should rent your car through Avis. It’s too expensive and they will only give you the car if you pay by credit card.
There are so many other car rental services available in Pakistan, but they don’t have websites so you can’t book your car online. If you really want to have that online facility then I’m afraid Avis is your only option.