I was just there today and filled up my 5# for $13.24. It took about five minutes to complete. I have been there 5 times now and have always had good service.The place where I go in Orange County is:
11061 Dale Ave
Stanton, CA 90680
It's been awhile since i refilled there, but I recall that it was pretty reasonable. Service is very good, and they refill the tanks out in back while you're paying inside. It's also one of the few places I know of that's open on saturdays if you discover late in the week that you're all out of c02.
they are no longer in costa mesa they moved to AnaheimAbe, I edited your thread so that we can use your's as a basis for all Scape CO2 inqueries.
Orange Coundy CO2 Refills
Spectrum Gas in Costa Mesa: www.spectrumgas.com
This is where I get all my CO2 refills at. This join mainly deals with the oxygen department (such as all those medical bottles you see). The shop is one of the "industrual garage" outfits. When you go there, just walk up with your cylinder and look for someone who looks like they work there and just ask for a CO2 refill. I have gone there numerous times and they are always very friendly about it.
It used to cost $8 a refill on 5lb. I think it is up to $10 now. There is no "pricing" on it since it isn't a normal service they offer, so just ask how much. You might get lucky at $8 I just hand them a $10 and don't ask.