Eshtemoa Silver Hoard found by Ze’ev Yeivin in 1968. The hoard dates to the time of King David.
According to 2 Samuel 24, David purchased the site from Araunah the Jebusite for 50 shekels of silver (at the time the shekel was a weight, not a coin).
The Mysterious Silver Hoard from Eshtemoa, Ze’ev Yeivin, BAR 13-06, Nov-Dec 1987.
Shanks, Hershel, Jerusalem- An Archaeological Biography, New York- Random House, 1995