Factory AC Will Freeze You Out

Speaking of R12, I have a friend who has about 6-8 of the 12 ounce (or so) cans you used to be able to buy for a few bucks. He doesn't need them. Are they worth much?
Here in CA they go for about $20 a can at swap meets. seen em as high as $40 but $20 moves them. Getting less popular now.....When I was in TExas, I saw R-134 for like 2.99 a can at H.E.B so I bought 5 and brought them back to CA with me in the trunk.