I wouldn't necessarily believe a person just because they have lots of posts or has been around a long time!!! I'm not saying don't either, i'd more be inclined to look at 'what' a person posts and if they have 'proof' of what they say. but i'll leave judgement up to you and other member s on that stuff!!!
I think mine was from poland, it took a while to get here anyway.
Its from a chemical research company so i'm not going to question the purity personally, i hardly think people sell fake SN when it costs absolute peanuts to make( people may buy the wrong type, but thats a different thing', there a company and so selling inferior products would mean no repeat business. since a shit load of members have bought from them, if the purity was down and the stuff didn't work people would be aware of it!!! although it has bee tested with a nitrite kit. don't forget this stuff isn't being sold on the dark net, its sold by legitimate companies as it isn't illegal. if they were selling low purity stuff they would be in court getting sued or legitimate companies wouldn't buy from them, they don't just sell to people that want to CTB lol. the y are selling to companies that want the stuff for legit reasons, but i'm sure people can seee that for themselves and don't need me to point it out!!