If someone shows up at my shop, I will recover them for free as long as the cases are off. Sometimes I just buy them outright for .15 a pound. As far as the refrigerants having value, R11, R12 and R22 are worthwhile to recover and sell. R134 and R410 aren't worth shipping. That includes all the blends as well. IE 401 A & B, 402 A & B, etc. I think all the blends start with a 4 except 502 if I remember right.
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