I received a quote from Air Liquide for 15 liter atmospheres of Helium 3 for $20,000. I think that is way out of line because, as I recall, the last time I bought it for $1,200 for 15 liter atmospheres. Anyone that has a cheaper source than the $20,000, please let me know. Thank you. Dr. Jerome L. Duggan University of North Texas Physics Denton, Texas 76203 940-565-3252