I live locally and went along to the auction house today. The previous owner was apparently a hoarder and the bike was found under wraps at the back of a shed. It is in a very sorry state; I think the auction site photos are flattering. It needs a full restoration, however it is mostly complete. I didn't try and turn the engine over using rear wheel/gears. It was first registered in April 1987, however the engine number is 1822 which puts it (on JLO's site) as a 1983 bike. The Laverda bible says the Executive wasn't produced until 1984 with approximate engine numbers 2000 onwards, so I think this may have been retro-fitted with an Executive kit. The fuel tank is showing signs of quite a lot of rust around the bottom edges and inside the fuel filler neck area, and the auctioneer said there are no keys with it other than two ignition keys which I tested and they turned.
Overall it is generally original with the exception of the exhaust system and the missing tail seat-pad. It would be a shame to break for parts considering these points, however I just cannot see how it would be economically viable to restore unless it sells for the auction estimate.