Vehicle Inspection in Nairobi

We have and you generally take the vehicle to the local AA branch for it to be inspected.  They don't tend to go to a garage as they would in the UK, for example.   Often the reason for taking a vehicle to the AA is actually to have it valued, rather than mechanically inspected. 

Personally, I would never buy a vehicle 'blind' and considering the cost of them in Kenya (especially Landcruisers), I recommend that you see the vehicle yourself, despite the distance and inconvenience.

I am not sure how you would verify the mileage (or Km), especially if the vehicle is an import.  However the mileage of a vehicle isn't a big issue in Kenya - I doubt that it would have been 'clocked'. 

If its a diesel, check whether it has a DPF, as these can give a lot of trouble and clog quickly, leading to substantial repair costs.

Also, if you don't know at least a fair amount about vehicles, bring a mechanic with you when you inspect the vehicle.  As labor costs are not so high in Kenya, you could bring one with you from your location, including room & board, for a tiny percentage of what you will pay for the vehicle.