I'm still kind of amazed everytime I get something from ... my favorite wholesale supplier, where the invoice lists the "list" price, and then "my" price. My price is usually around 50% (or less) of list price...
The only problem is most wholesale places require you to have some sort of account. Not a problem if you work at a shop, but DIYers may have a little trouble getting that.
.. On the topic of Freeze 12.. Don't use it. If you ever have to have the unit serviced, it'll have to be evacuated to a "contaminated refrigerant" unit instead of a regular R-12 or R-134 machine. And you'll be charged accordingly.
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