As others have said before, please be very careful when trading with new users. It seems Anasto/wakalo/TurtleDove/EasyBuild/DuckFace/GetSmart/SuperAndroid etc. all registered in Oct. 2012.
If they are trading for Steam keys, ask for a link to their Steam profile. Usually, scammers will create new accounts and then quickly delete them. Same for Desura or any other service.
If they are honest traders, than providing any of this shouldn't be a bother.
EDIT: Changed EasyBuilder to EasyBuild. Thanks to SimpleUser for the heads up!
EDIT2: Added GetSmart and SuperAndroid to scammer list.
Post edited October 21, 2012 by Malv0isin