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...this was toward the top of the line for Miele, and the Sante group of components, comparable in quality and function to Dura-Ace, but not quite as well known.

The only time I've seen it personally was on a Schwinn Paramount, so a decent component set. That one in your picture would go for in the neighborhood of 500 bucks here in NorCal, but prices go down in winter and up in riding season. Also, where and how you sell it has some influence. E-bay prices are often higher than Craigslist prices.