Drain AC system

Found a guy willing to buy my engine for $100. I might have been able to get more, but I can’t get really started until the engine is out and it’s easier to sell it when the buyer can hear it run in the car rather than sitting in the corner of your garage. The waiting is getting to me, so need to let it go. So the AC needs to professionally emptied because the R12 coolant is nasty stuff. Found out there are only two places in SF that do it. I picked one, topped off the coolant (leaky water pump) and drove off. After $35 and an hour it was done. Car rides pretty nice, too.