ya just gotta luv this chart., page-18

Got this from a Google - dont know if the $ value are still accurate:

"The value of coal on the ground is easy to assess; it is published in the Wall Street Journal, and can be viewed on a number of Web sites. Depending upon quality, it can
sell for between $30 and $40 per ton. It is simply determined by how much the buyer is willing to pay, and the expenses incurred by the seller to produce and deliver it.
However, the value of coal in the ground is a much trickier thing to determine. The price of coal in the ground depends upon four basic factors: 1) thickness of the seam, 2)
quality of the coal, 3) location of the deposit, and 4) the ease of access to the property and seam."

From what I read
1. seems good
2. excellent high BTU celan and low S
3. easily accessable
4. excellent