From things I've read and heard, there is a small but loyal following for at least some of the CZ series (with single digits, -3, -4, -5, -6, etc.) and even claims that they are still today among the best coin detectors.  I wasn't detecting when this series was available and don't know any more than a few snippets here and there in posts.  They do show up on eBay and from (at least some of) the prices, I surmize they are still in demand.  Would someone post an overview of the series, highs and l