[scarmig]

I live in San Francisco too and know how to get both. The vape shops sell only vape equipment, in theory; in practice, they "secretly" sell vapes behind the counter, but you have to ask for it (and occasionally they'll say they don't have any; hard to predict and plan for). And selection is limited to gaudy, giant flavored Chinese vape brands of unknown provenance; Juul is nowhere to be found.

Meth, with varying levels of fentanyl adulteration, you can get delivered or buy from the street corner, depending on your neighborhood. From where I am, I'd estimate about 10 minutes to get a hold of the meth; 20 minutes to get a hold of any vape; and Juul probably an hour (place in Daly City sells them; I'd have to drive).