http://forums.steamrep.com/threads/report-76561197972256482-other-other-game-items.128943/
SteamRep only lists 2 unconfirmed reports, because lately he's been trading (stealing) cd keys, and uplay keys from users. Insisting the other party "goes first" due to his rep.
Well let me tell you - rep on steam profiles means absolutely nothing, since you can delete any negative reports.