What to do with R-12?

I bought a house. Apparently owned by one of the worlds greatest hoarders. I've hauled 17 trailer loads to the dump.

One of the thing I discovered was an unopened 30lb canister of R-12.  DuPont Freon 12 in a sealed tank still in its original box. It's been sitting in the attic for more than 30 years.

Looks like the stuff is pretty valuable, but also looks like I would need a special license  to sell it.

Any thoughts?

Facebook marketplace. 

In reply to Toyman! :

I'm not sure it can be sold there. eBay has no listings of similar quantity. 

In reply to SV reX :

There are several canisters listed locally on FB for $300-$400 each. If it was R22 I'd probably be interested. 

In reply to Toyman! :

I can modify the box with a Sharpie if you like. 😂😂

eBay banned all R-12 just very recently.  I've been trying to figure out where the market shifted--FB marketplace looks like the likely answer.

If you don't want to risk a legally sketchy sale, it looks like there are 3 disposal program options in Georgia:

https://www.epa.gov/rad/find-rad-partner-programs

You could also see if any AC shops can use it but I think it is banned and you have to buy substitutes, might just wanna drop it for recycling I wouldnt want my balls in a vice over something I can't use to make $100.