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

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

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.

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

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.