{Collins} Astrocom Headset for use with Boatanchors

I occasionally see an eBay listing for a Astrocom Model 10956A BNIB w/CD-307 & R-392 CABLES.  The eBay listing number is 5830852258.  Does
anyone have any knowledge if these are worth the money (starting bid is usually $59.95, I think Buy it now is $99.95.  Any info would be appreciated, especially
info on headsets suitable for my A-4 receiver.  Thanks in advance, Steve N3WNG (and a CCA member).  
Sponsored by the Collins Collectors Association http://www.collinsradio.org
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