Seen this all before on the Topix Valium board before it was closed. You had pro scam teams operating on there. They seem to have moved onto the darknet operating as Cocaine sellers. Will be immense amounts of padded feedback, selective scams and exit scams. They also have a big presence on the darknet forums.
I am sure this will be downvoted to hell but who cares. If you see a UK coke vendor, LOOK VERY CAREFULLY - IS IT TOO GOOD TO BE TRUE?
I commented on your other post fairly negatively (as it was directed as us which I felt was unfounded) but here the sentiment of your post is good advice, researching new vendors should always be done diligently and beware of 'too good to be true' offers.
Personally I would advise if your looking for coke in the UK to consider the 'old boys' who have a proven reputation and less to gain through short term scams:
Lloydsbrothers
AlexSosa1KG
Us (thetoyouteam)
Mirkovo
(sorry if I've missed anyone - will edit if anyone mentions a name I feel happy putting ours to.)