When I was in USA on a holiday I realized how difficult it is to buy poppers in USA. It is almost impossible to buy poppers in a shop. A few years ago FDA warned people of poppers in USA. USA has many gay people and many people want to buy poppers. The only way to buy poppers in USA 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 USA the shippment takes about 5 working days. Another older website is
http://www.lederreiniger-deutschland.com/ww. (updated November 2022)