I normally scour the bay and can get about $10 per can. I have also bought from Napa - they have a ton of it back behind the counter, though it is $35 per can. Just present your 609 and you're good to go.

R12 is not hard to get at all.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280