If you really want to burn your money go to German Computer Check in Salwa Road, the one with two car lifters and the colors of german flag in the local name.
These people don't speak a single word in English, very hard to understand what is going on with the car you want to buy. The fellow that make a road test of the car drove it like if he is willing to die, he doesn't care I was inside with him, he reach like 100 km/h in the night with the ligths off and he brake the car very close to the speed hum at that speed. After he ask me for a good tip if I want to know what is the real problem of the car that I wanna buy. What is this? I have to pay tips only for this guy do the job that I already paid.
Very hard for non Arabic Speakers, they treat the customers really bad.