Well, it depends on what exactly you mean by 'freon'. Freon is a registered trademark of DuPont for a line of CFC and HFC refrigerants manufactured by them. It has come to be a generic term for refrigerants in general - sometimes even those which aren't even CFC or HFC refrigerants. You need to specify an exact refrigerant type (e.g., R-12, R-134a, R-22, R-414b, etc.) for this question to be answered.
tin cost about $50.07 per pound
Titanium can cost up to 69$ per pound
65$ per pound
$5.2639 per pound
It can cost up to $56 per pound depending on the rolloid
£321.33 ($522.24) per pound at today's prices
How much does the element helium cost per pound? hmm. idk go ask someone else
silver price per pound
18.00s per pound
$2 per lb
$1.01
$1,500