Worth of small cans of R-12 and R-134a?

[KevinW]

A friend is clearing out his garage due to health :( and I am assisting.
Found these small cans of refrigerant.
Are these worth anything?
I am not even sure they can be shipped (Post Office frowns on hazardous gas)
There are a few more cans of R-12 not shown. Thanks

[Jonesy]

Sales on ebay indicate:

R134a goes for $11 -$15 a can
R12 goes for $35-$55 a 12oz can

I have bought off there and had it shipped UPS no problem.

[KevinW]

Thanks! Just have to make sure they are full and they will be up for sale.

[Burd]

Cans need to be rust free, I sold all my cans off, 3-4 were empty, leaked out.
They can be shipped ground w/ correct placard on, after all, they were all shipped to auto parts stores.
Like shipping the space saver inflator, my PO made a federal offense of it when I shipped one.