Unless you buy them from PRG they are a lot less ($50ish).I bought them for my 09 frontier with just 2" coilover spacers. Without them my alignment was unable to be performed properly. Just be weary of the $290 charge that the dealer wants to install four bolts. Your best bet is to install the bolts yourself then take it to the dealership afterwards.
Edit: The bolts are $18 a piece. total cost came to about $80 for the alignment cams.