I would prefer owner, as i am sure that nothing is hidden unlike the case of second hand car dealers. They are the ones who do cheap repair to cover the fault and polish car look like new and under that comes with lot of secret surprises within month of ownership. I myself have been bitten once with those aweer guys and wouldn't recommend them to anyone again. I heard that they also reverse the odometer reading to fetch better sales price. This should be criminal activity like in US to Fidel with car odometer reading, as imagine if car shows 60k km and person takes it to long drive thinking its less kms and car can take that much strain, and car break down in remote land as it was 300k kms which has been reversed. Really bad.