A few years ago, I was offered the contents of a garage. Mostly junk, but among the bits and pieces were several cans of R-12 automotive A/C refrigerant. At the time, I owned a vintage musclecar resto project that I planned to use the R-12 for, but I sold the car and now I have the cans of R-12. Can I legally offer them for sale or am I asking for legal trouble? They are the small cans that parts stores used to sell to consumers so they could recharge their systems themselves.