They weren't really missing at all.
(but you knew that, didn't you)
From the Wall Street Journal:
Who Needs the Euro When You Can Pay With Deutsche Marks?
Germans Hang On to Old Currency; Admiring Brothers Grimm, Clara Schumann
Shopping for pain reliever here on a recent sunny morning, Ulrike Berger giddily counted her coins and approached the pharmacy counter. She had just enough to make the purchase: 31.09 deutsche marks.
"They just feel nice to hold again," the 55-year-old preschool teacher marveled, cupping the grubby coins fished from the crevices of her castaway living room sofa. "And they're still worth something."
Behind the counter of Rolf-Dieter Schaetzle's pharmacy in this southern German village lay a tray full of deutsche mark notes and coins—a month's worth of sales.
Germans have yet to give up on the euro. But as Europe's debt crisis rages on, many are indulging their nostalgia for the abandoned mark by shopping with it again—and retailers are happily going along.
As defunct currencies go, "die gute alte D-mark," or "the good old D-mark," as it is still affectionately called, is far from dead. Germans officially traded in the currency for euro bills and coins on Jan. 1, 2002, and the mark immediately ceased to be legal tender. But 13.2 billion marks—worth €6.75 billion ($8.3 billion)—remain tucked in mattresses, old prayer books, coat pockets or otherwise in circulation, according to the Bundesbank, more lucre than the euro bloc's 16 other ex-currencies combined....MORE