I've gently favoured Dunhills for years. The most recent ones with JLC movements may well command a premium at some distant time in the future, but ETA powered stuff just gently declines - and that's the really nice facets, not the 'ironic' stuff. I wouldn't unless you really really like the watch itself. Otherwise, wait and get a nice facet. At least you'll end up with a classic design with a bit of history.
It may well be worth 10K to him, but he's going to be one of very few who would value it that way. Broken I doubt it's worth more than the weight in gold. Even working I doubt it's much more.