You can't hardly buy R-12 at any auto parts stores any more. I've tried looking for friends, and they all quit handling it.. It was high $$$$ when I last bought some. About 35-40 bucks a can. That's why I decided to buy a 30lb can when I came across a deal I couldn't refuse... I got 30 lb's for 85 bucks.. Not bad.. :) I've seen 30 lb's of 12 going for as high as nearly $700-$800 back when the prices were out of sight, and the demand for 12 was still pretty strong. I also need 12 when I work on older refrigerators and freezers.. MK