Hello Brinho...
I am, sadly, so under-informed regarding most things in ANY of Africa, other than, of course, all the BAD press we hear on the news and elsewhere. Of course I have no idea where in Africa, or what your general economic situation would be, your actual involvement or even the availability of film/video industry level equipment and technology.
Assuming you have SOME level of accessibility to money/financing and equipment resources, I can only point you in a direction I personally would take, and hope to take but will have to wait myself a bit longer to come up with the necessary budget resources to pursue.
Perhaps even here, on the Videomaker Forum classifieds section, you could find honest, reputable people in the business who are upgrading, or getting out of the business, and offering equipment at a decent price - of course shipping, export regulations? and security might be a problem???
I tend to avoid making such purchases via Ebay - simply too many instances and too many risks involving unscrupulous sellers for my tastes. I know nothing of what is locally available to you, but I do know that B&H Photo-Video, New York, has an extensive (at times) used/resale department and they are trusted in the industry. Their pricing isn't always so outstanding, but is usually in line with the term "reasonable".
I tend to avoid many of the companies, even though they maintain full-page, or more, ads in various video industry related magazines and trade issues, because I am so tired of their bait-and-switch tactics or worse.
I paint a dismal picture, sorry, but I suspect your best bet to identify a low-risk equipment acquisition environment would be to join, participate in, and check out the "classified" forums on such places as Video University, Wed Vid Pro, DV Professionals, WEVA and here, to name a few. There are probably others, and probably located closer - European continent or even some areas in Africa - I suppose a Google search for such forums would be positive?
I cannot think of anything better, or any other approach, without being more informed of your specific situation, location and economics involved - though you DID say something about restraining budgets being (understandably) a "big stressor" in your part of the world. Good luck in your efforts.
EQUIPMENT - budget notwithstanding, I have great faith in utilizing a maxed out version of the newest, biggest iMac along with its included iDVD, iMovie, iTunes and related software, along with a camera such as JVC's GY-H100, and perhaps a wireless mic rig from Sennheiser, along with LitePanels on-camera light and one or two Zoom H2 digital recording units as a STRONG, but still relatively expensive, basis for a person seeking to start video services provider business - be it event, documentary or entertainment, or commercial.