Certainly no expert, but I would just look at what other ships are being sold for, or at least advertised at.
What extras it has? paint, seats, bubble windows, night kit, insruments etc.... any optional extras
Try:
Avbuyer.com
Google Robinson R44 Raven 2 forsale etc...
eBay sell a few or at least advertise a few...
Helicopter operators around the UK who sell heli's.
Robinson dealerships etc...
Them sort of things.
What are they coming out at new in the same spec aswell... currency exchange rates worth looking at to sell outside of the UK.
I mean I dont know but there some of the things I would check first.
