SOLD.  
I bought the set of drivers new from Darrel Hawthorne in 2009, they've amazed me ever since but its time to move on.
I prefer a local St Louis sale, but have all the orig shipping boxes & will ship at the buyers expense.
The set goes for $1600 + shipping new.  Offered for sale for $800 + shipping.
The Sterling crossovers are the only audio jewelry that I own & are worth the asking price alone.  Massive Alpha Core inductors & huge Mundorf caps, plus Solen inductors & Mills resistors.  Each crossover probably weighs 5-6lbs!
I also have a DIY Duet baffle that someone local can have.  I won't ship the baffles.  I also have the mounting plates that Darrel H made and a 2nd set of Radian covers with the backs drilled.  
matt