Took a bit of looking, finally found history of coal prices.
From www.steelonthenet.com/files/metallurgical_coal.html
Prices ranged between $68 and $74 a ton during last quarter 2004 and 1st quarter 2005.
SP during ranged approx. $3.50 to $5 in that time. Prices are from etrade, sorry can't paste chart.