Since they are making all new cars switch to the different kind of freon the older stuff is less and less common, I dont think they are even allowed to make it anymore...
Most repair shops recover the old freon, by vacuming it out, and then when they recharge the system they charge you for the difference they put in...
So I would imagine that they would discharge it for free.. specilay if they gain the difference in freon from it... though I dont know if they still use the r12 at all anymore... a couple years ago it was reall expensive i cant imagine what it goes for now. they might not even want it anymore..
-as
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