Goddard PDA nav system

This is a nav system for a 2-place glider that includes cradles for PDAs, cables (one long; one short), and a splitter box to distribute GPS signals to 2 devices.  PDAs are not included (I never owned any).

I have no idea what this is worth (if anything). I've listed a price of zero, because an amount is required - but I don't plan to sell this for less than the cost of shipping it. If you're interested, make an offer.