R-12 freon to sell, how?

here is a link to a 20 lbs of r-12a for a quick comparison. cost 272.95 and free shipping that's for r-12a NOT r-12 so it seems that it (r12a) is slightly different.
I did see others about 50.00 or so cheaper but couldn't find out if it was free shipping or local pickup.
http://www.amazon.com/dp/B00DJDYQFA/?tag=joeychgo-20



272.95/20=13.75 per pound new cost and I've seen in it as low as 10.95(r12a)plus shipping (high shipping cost kicked it back up to $13-$14 by buying a 6 pack of 1lbs cans ,but a single cost about $18.00)
and you have 8lbs *13.75 =110.00.