Hi Chazzy,
It is odd that we're still eligible for trading on the Expert Market. After the communists deposed the tsar in Russia, the bonds issued under the tsar's regime still traded, for a few pennies each, for decades. I hope that's not what's happening here - a few dealers making long odds bets, "just in case."
From the line in Simon and Garfunkel's song Hazy Shade of Winter, "Hang onto your hopes my friend..."