rictorn,
as you made some statements of performance somewhere, the nacra 18 sq is bloody heavy and was said to have a tendency to nosedive downwind when trying to do the wildthing... you will never catch a modern A with that. the boat Hans is selling might be a different story. It is a little lighter than the nacra and could have the potential to be as fast/faster upwind than an A in medium winds as it is wider and carrys more sail. The advantage of the old nacras around is that they are quite solid and sold between 1000-2000 € and mostly you just need a new sail on them and thats it. but its a boat which weights more than two A! and you better never capsize it...