Need to fill my bottle. I would've sworn I used a fire place down by the airport - but can't find or remember the name. They were mucho cheaper than a welding supply place.

 

I used Phoenix Welding Supply.
154 E Baseline, Mesa 85210

$18.81 for a 10lb as of July
For me it's close by and easy. I didn't really shop around because I didn't figure it was worth the PITA to go somewhere out of the way. SOAZ uses the "Party Place" stores that sell for soft drink and baloon stuff. He swaps his entire tank each time. I think when we compared notes, it was about the same price give or take a buck.

 

Good call. 21 and some change for 15lb.