Do you mean the Death Star, Steve? If so, £240 hammer which is remarkably high given it was "unchecked for completeness" and there appeared to me some of the plastic parts missing.
The modern "prototypes" (test shots, surely?) were going for absolutely insane money. £500 for a Darth Maul?? Perhaps someone who knows what they're talking about can enlighten me on why they went for so much but I couldn't see anything different to those regularly offered here for less than £100.
Was very tempted with the Walrus Man Palitoy 20 back but I am on best behaviour. With a bit of tidying to do someone got a damned good MOC for £260 hammer.