It came with the car when I got it, therefore I'm not sure how much they cost other than what I see them for sale for online ... the thing I'm wondering is if the harness is something standard or Nissan specific, and if that increases the value any. Otherwise it's like the cheapest thing I have for sale, and I may just keep it. Mainly because I don't have a boost gauge other than data logging from my AEM Series2 :/