Well the cheapest that I can find the current OZ Matrix 180CS set for is $325 shipped on eBay. And my set comes with the extra tweeter (which looks like a 180CS one) and extra crossover.
$300 shipped
I am thinking about keeping them unused just to own a piece of audiophile history.
OZ Audio site: "these are the speakers that produced the first "perfect score" in IASCA competition."