this isn't another sham listing , I am retired and selling all my HVAC equipment , including 18 lbs of R-22 Freon to get ya started , NOT certified yet ? NO PROBLEM get certified in as little as a day with quick online course , start servicing home HVAC systems and make up to $100 dollars an hour , the Freon with this set up is currently selling for $120 per pound . so don't miss your chance at making money .