If I see a car being advertised by a private person or a dealer (say, on Yahoo Autos) that I like and want to buy it for myself here in Lagos, what do I need to consider and what do I need to take note of? My concerns are :-

a) tropicalisation
b) what can I expect to pay as duties and clearing costs and other costs?
c) length time of payment for the car to delivery to my compound in Lagos?

Thanks