Here are the prices:

http://www.egauges.com/vdo_bld.asp?Series=Nexus&Cart=

Boost - 250
Oil Press. - 250
Water Temp - 200
Oil Temp - 200
Fuel Press - 250
Controller - 265
Nitrous - 250
EGT - 230

You NEED the controller in order to have any of the gauges according to that site.