hi ... are u sure the sn of the european seller is pure ? if so, how? ...sorry for the questions, i just wanna be sure );
It's generally considered that that seller provides good quality items. Best not to put lots of info on public threads, but you could always PM someone if you still needed more info, however what I've already told you should be sufficient.
This site also has a very good search function (and advanced search).
Try using that to search, research, and read up.
note : If you want to talk to anyone privately (instead of posting on threads), then you can use "PM" (PM = personal message, a bit like sending someone an email)
You need to make at least 5 posts and need to have been active for at least 24 hours to get access.
If you don't know what to post, you can post in some of the "games" threads (see "offtopic" section).
Once you have PM access, when you hover the mouse pointer over a user name, you will see a "start conversation" button...
Note : As always, please note that I strongly encourage you to seek help with whatever is troubling you. With the right help things can improve. There are many sources of help if you look and reach out. Please seek assistance in any and every way possible. You alone must decide upon your actions and take full responsibility for them, and you should always favour seeking help and keeping out of harm's way.