This raises an interesting question. If you own something desirable, which is brand new, and you try to sell, how much is it worth against what the OEM would sell it for?
I remember somebody trying to sell some CSLs, brand new still in protective wrapping, for effectively 98% of the BMW supplied costs and really struggling.
I'd have no problem buying new items "2nd hand", but would expect some sort of discount over the manufacturer prices due to the potential risks that id be accepting.
I'd have thought that 80% of the original price would be a good marker, any higher and I'd be tempted to merely wait and get it from the OEM and have the protection that comes with that.