This is a Buy Now trade, which is completely automated. There is no need to add this user as a friend, just close this modal and click the green button below the items to begin the trading process.
The website you were about to visit is not in our whitelist:
There are a lot of imitation phishing sites and so-called item generators out there, and the safety of our users takes priority! If you see this message when you thought you were going to a genuine website, you probably weren't...
Alternatively if the site actually is legitimate, open a ticket and we'll whitelist it.