My apologies to all who have responded! 8lbs was a wild guess on my part. I weighed the rocks today. They weigh 24 lbs!
I'm asking $40 for the lot. These are dry and cured. There is nothing rotting in them - just rock.
I'll havde to start over with the PM's. Deleting all PM's. Fisrt come first serve. For those in the city - I will be in the city tomorrow on a doctor's appt.