I think I have just received the Schrodinger's Cat of Railway Modelling. Second hand loco from Hattons, described as tested and working yet it just arrived fully sealed in the original manufacturer's cellophane from twenty years ago...
This was an undecorated Proto 2000 SD9 (rare to find in the UK) and I am happy to report, it is complete, works a dream and all the bits are there. Just baffled about the cellophane...