Yes , You can get Financed for 2nd Hand Cars too here in Qatar ..:)
Which ever car you intend to buy ..Go to their Trade in Section and then choose your Car .. And rest they will make you understand..

Or you can try different 2nd hand car showrooms in Qatar.

Any Bank will do the Financing ..
Best Of luck ..:)

Visit the Toyotas Trade in Section .. Had been their a week ago ..Saw many Avalons and Camry and Corolla for Nice Prices ..( If u intend to Buy a Toyota - The most reliable car in Ad Dowha )