got scammed by a high rep one.

Maybe it was an impersonator of a high rep user. Did you checked profiles and such before trading?

Also, no calling out is allowed here, so be sure to report the right person on a private Support ticket and on his/her Steam profile, with enough proofs (conversation prints, trade history, etc.). SteamRep is slow as hell, but it's usually helpful for someone else don't fall on the scammer's tricks when he's flagged.

Then move along and be careful on the next time.

Are you sure you traded with the right person, and not with an impersonator?

Check your activity feed and make sure the person you friended wasn't an impersonator before reporting them.

Install the "Enhanced Steam" Browser Addon, with links to all major sites on the Steam profile, thus you will never add an impersonator, if you check the links. - http://www.enhancedsteam.com/

Move along. these are not the droids you are looking for

Well, there's not much you can do about it, you can report him but steam isn't probably going to do anything about it, because the trade took place outside the trade window. And maybe if you bought your game with a credit card, maybe you can do a chargeback?

Did he provide you a link to his/he steamtrades profile ? If so you are prolly dealing with an impersonator. Report the trader to VALVe by clicking on the flag icon. If you used PayPal (with or without) Credit Card you could try to initiate a ChargeBack for digital goods not delivered.

well, how did you check his rep?

Do a charge back, it sucks but it is your best bet atm. It is not uncommon for scammers to use legit accounts inorder to get away with this nonsense. This is how other legit traders sometimes get false -rep, like me -.-. (Scammer went around claiming I was selling Witcher 3 for keys). There is a pic of him on my main trade thread if you want a look, and if the person who you traded looked similar (few games but high rep) you most likely got scammed.

Isn't calling out prohibited by rules?

Steam comment reps are means NOTHING! People needs to learn that already. Those reps are from his/her alternate accounts...............

Check SteamRep and SteamTrades for rep, not the profile... And don't trust given links. Check the actual profile on these sites.

Otherwise, you screwed for now... And calling out here is the lobby of a ban... Delete the profile link...

and now i got -rep from him

And he copied the exact same -Rep message you left for him on your profile.. so he's trying to make you the buyer who didn't pay ?

u know he read this and know he changed what he wrote on my rep

Lesson learned: don't trade anything on the Internet unless you're willing to lose whatever you put up. Sad but true.

Never go First.

sorry for your loss. my recommendation for new users is only trade for cheap bundle shit and you won't get pissed that much if you get scammed. by checking that user's steamrep profile you can see there were already some cases opened for that guy which is an indicator that trading with this kid is probably dodgy. stay off from such people and you won't get burned.