After the recent case of a CSGO youtuber falling for one of these fake website phishing scams, it seems pertinent to make sure the community in general is more aware of the way they operate. ANYONE can fall for these scams, not only new players, and they are designed to get around Steam Guard protections in ways you may not be aware of. Please have a read of the following threads for detailed information:

This post on r/GlobalOffensiveTrade runs through the case mentioned above, and SteamRep have put together a more in depth guide for spotting and avoiding these scams here[forums.steamrep.com].

Both links also give information on how to properly secure your account if you feel it has been compromised.

Thanks to Shubbler from r/GlobalOffensiveTrade and Lava from SteamRep for putting together these resources.

Note: I know outpost is no more, but this group still has a lot of members who trade so I figured I'd pop a warning here.