Publicly putting the shame on that guy is what cRPG forum is what about.
Well done, since that guy is indeed unworthy of any trust.
Save his loomed weapon, waiting for a gentle "please give back", but he even has to show the rules, and try to add gold in th transaction.
If i didn't know better, i'd say this Lothar_the_Slayer_II is used to doing all this to actually scam in gold poor fellow who accepted his previous transaction.
In fear of a bad reputation, or worse, they'll do the reverse trade adding money on top of it. Filthy Lothar indeed.