Hey Nicolas, how are you doing? The issue of rarity is a difficult subject. I would tend to disagree with you about it. Would I buy a watch solely because it was rare and expected it to appreciate in value? 100% yes. I would so the same in any asset actually. Many things attract people to watches, and one of them is rarity. For some people, it is the MOST important factor. For others it is totally unimportant. It is all a part of what makes a watch special to the person concerned. Just as some people find the colour of the metal a key issue, I cannot see what is wrong with finding rarity a key attraction.
For me, rarity is one factor and actually figures quite low down the list but it is a factor. However, i tend to seperate my watches from my investments. I buy an investment in order to see it appreciate. I buy a watch for many reasons and not often as an investment. However, if i was to look at a particularly rare watch and considered its investment potential as high, I can't see why i would care at all what teh watch looked like or any of the normal things I would look at if i was buying one to wear.
Rarity has been an issue that has been discussed again and again on these forums. I have to say, although it is only a part of a watch's "DNA", I for one would like to see it accepted as a legitimate part...albeit one that will vary from 0-100% for different people.