What does an A/C system charge with R-12 cost?

[Naplm00]

you can use these to convert your bungs over to quick connects that will work with 134a+ hoses and cans

http://www.sjdiscounttools.com/indvalh11.html

you can get these at most advance, autozone and pepboys too

[E30_Pare]

I was able to switch to r134a for 150$. It's not as cold as r12, but it doesn't bother me.