Declined 76561198044577302 (New New XXL), et. al.

Victim:
|steamID: Big.Buddha
|steamID32: STEAM_0:0:29087783
|steamID64: http://steamcommunity.com/profiles/76561198018441294
|customURL: http://steamcommunity.com/id/BigBuddha
|steamrepURL: http://steamrep.com/profiles/76561198018441294

Scammers:
|steamID: NEW NEW XXL
|steamID32: STEAM_0:0:42155787
|steamID64: http://steamcommunity.com/profiles/76561198044577302
|customURL: http://steamcommunity.com/id/5069916427522
|steamrepURL: http://steamrep.com/profiles/76561198044577302

|steamID: schrezze
|steamID32: STEAM_0:1:57136249
|steamID64: http://steamcommunity.com/profiles/76561198074538227
|customURL:
|steamrepURL: http://steamrep.com/profiles/76561198074538227

And what exactly did they do?

There is a screenshow of the trade happening on the link you have posted with my first post, and I'm afraid I don't have a screenshot of the message/alert that my game has been revoked as I didn't took one.
Regards.

SR cannot mark someone without solid evidence (aka screenshots or videos)

Reopened -- OP has evidence

Time extension has expired, feel free to contact me if you do in fact have the information