Be careful of buying a pre-owned vehicle

I would have given ZERO if i had the option. I would reccomend not trying to buy a vehicle from them as I had a very bad experience. I went and had a look at a 2012 White Mercedes SLK 200 on Friday. I could not drive the vehicle because the vehicle was being serviced and had to go through the test. I indicated that I am very interrested to buy the car cash. Ruddy never e-mailed be the service history or information as he promised. I phoned the select sales manager and he just said sorry, the salesman fight amongst each other to close sales/ deals. This is very unprofessional indeed. Ruddy (salesman). I contacted him on Monday and he said that they are still busy with the service. Tuesday I just get a Whatsapp. "Sorry car is sold." Al he had to do is call me as I indicated that I want the car before selling it. Surely it is just good practice to find out before selling the vehicle. Do they not write on a board that they have a potential buyer so that the other salesman know about it. BAD communication between salesman and very *********.