And wine is supposed to be drunk, and stamps are supposed to go on an envelope, etc. You get the point. Some people build models, some collect them. Personally, an unbuilt model in a box has no value to me. I buy "rare" Pocher kits and build them... I couldn't care less that I may have "ruined" the value of an old, rare kit by building it, but to a collector, the whole point is having that model unbuilt in a box, and a serious collector will pay serious money for a model he wants.
Builder, collector... to each his own.