Nissan Patrol 4x4 (Africa)

I want to buy a new car video player gps . I find one in this site http://www.gpsdvdaudio.com/nissan-navigation_c78 .It is cheap and looks good , but I have never bought a product from this online store. Could you give me advice?
Or can you offer me other good sites ?I really need your advice .

Jiek,

Can't see where you are from, but have a look here http://www.patrol4x4.co.za/viewtopic.php?f=48&t=481