Have you bought some R-410a? I happened to check the price at the same place I bought mine less than 4 weeks ago, and the 25-lb cylinder for which I paid $179 is now sold for $249.
No, but I should have. I looked into it and the price was a little higher at the time. Since I was going out of town for a few days, I thought I'd wait to order it. By the time I did get back, I'd forgotten all about it.