When I was in California on a holiday I realized how difficult it is to buy poppers in California. It is almost impossible to buy poppers in a shop. A few years ago FDA warned people of poppers in USA and also in California. California is a hot spot for gay people and many people want to buy poppers. The only way to buy poppers in California is to buy it online from a online shop in Europe as in some European Countries it is allowed to sell poppers. http://www.poppers-online.ch/en and http://www.lederreiniger-online.de/en. They accept Credit Card with a payment link and ship worldwide. To California the shippment takes about 5 working days. Another older website is
http://www.lederreiniger-deutschland.com/ww. (updated November 2022)