Most of the D22 services are pretty reasonable price wise except the 40,000, 80,000 & 120,000 ones, you get Pwned on those...
http://www.nissan.com.au/~/media/Files/Brochures/Owners/Capped Price Service Lists/Navara D22.ashx
http://www.nissan.com.au/~/media/Files/Brochures/Owners/Capped Price Service Lists/Navara D22.ashx