Method SN purchase in USA

[awayoutn]

I live in States and seem to find SN made for food available every where online and available for purchase inside US. Is this common in US before I order? First time doing my homework

 

[houseofleaves]

You need 95% and more purity. Not 0,6%.

 

[awayoutn]

10 lbs bag/35$/ claims 99% pure shipped from east coast.