You are looking about $25 to over $50 a can on the black market, it's technically illegal to sell without a license now. On ebay I've seen 4 cans of R12 and 2 oil charge cans sell for over 150$ You'll have less wrapped up in a DIY R134a conversion. Never the less, if you need freon you have a leak. And at over $25 a can that is a very expensive way to find a leak. You can use freeze 12 "a R12 replacement" they say. It's more expensive than R134a but at least legal to buy, however a properly converted R134a will still perform just as well.
Last edited by Starmavin; 07-31-2007 at 08:40 PM.