Martin
I hope this does not breach your advertising policy but I am trying to find out what the market value is for a suspension compressor is worth.
My friend who is a mechanic has just told me he has an as new compressor for sale, this compressor was supplied new from LR to fix a problem with a customers car, turns out the problem was a damaged pipe that only was diagnosed after they fitted a new pump.

So as a result the new pump was taken off the car and the pipes fixed. He now has a new pump that was fitted for 20mins and has asked me to sell for him.

I will obviously give a donation to the site upon sale so the question is how much should I advertise it on here for?

Daz 2017 4.4 Autobiography FFRR - love this car
Gone - VW T5 Transporter
Long gone - 2009 Disco
Long gone but never out of my thoughts - 2008 TDV8 HST

Are they not about £375 new, second hand you would be looking at £50 and a Mars bar  2.7 TDV6
22" Stormer alloys
Side steps
PS3
Headrest monitors
Black badges
Stainless tailpipes
Privacy glass
L.E.D. lights throughout.

I think that there may have been a change in supplier of these components recently to an upgraded specification and that, is it is one of these, it may also then require a different relay and software upgrade when fitted; depending on the age etc of the receive car !

Best check it out.