Reliable car sales advice?? (Harare)

Hi

I'm a UK PhD student and will be working in Binga and Chiredzi Districts. I need a high clearance (preferably 4x4), very reliable vehicle that can easily be resold at the end of my 6 months in Zimbabwe without a loss (or too much of a loss)!

My budget is $6000. There are so many car sales around that I am struggling to find one that I trust. Advice on good companies/people would be much appreciated.

Thanks

Beth