I buy it in 100 pound sacks at my local masonry supply - in fact am off to buy another sack tomorrow. My recollection is about $40.00. In Connecticut - Homer Godfrey and Sons http://www.homercgodfrey.com/ They also have Dental Plaster - perhaps better for casting rocks - and Structolite - which is a great top coat for Hydrocal - tan color and puts some texture over the hydrocal.
Herb Cotter Ct. S. Gaugers
