In his book "When God Reigns: A Study in the Parables of Jesus" Dr. C. Michael Moss, the Director of the Bible Program at Ohio Valley University, cites the NIV Bible note that a mina was valued at three months' wages. He also states that if we were to calculate the Mina according to today's earnings at minimum wage a mina would be worth approximately $4,200.
$1000
The word of God.
nothing
only as much as someone is willing to pay for it
$300, if it is personally signed
Not all that much unless it is a family Bible with somebody important in it. Old Bible's are quite common. If it is a family Bible with genealogies and such, you may find a collector somewhere.
ten dollars
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Maybe the name is mina. Seven weights related to metal (thus creating "coins") are mentioned in the Bible: talent, mina, shekel, beka, gerah, pim, and kesitah.
£200
probobably alot