Raptor: My cylinder is 80cf. Had it refilled about 6 months ago and I honestly don't remember how much it cost. I do know that if it had been outrageous I would remember. Biggest cost anymore is just buying a cylinder, picked this one up off of CraigsList. 80cf lasts me 2 or 3 years.Interesting. How large is your argon tank, and how much does it cost to refill?