Not sure if you already know this but both trading and dueling is broken i tried to trade in an armor for a 70% scroll and we both lost our items, In the mean time when you duel somone and get killed you can still kill the same person even trough you killed him first time in duel, and the only way to fix that issue is trough rejoining the game @berezaa
Happened to me once, but didn’t after that. Please look into this! ^
I fixed the dueling issue, a patch will be released tonight to address it. The trading issue is scary, I re-wrote a portion of the trading system today to address an economy exploit I was reported today so hopefully that also fixes this issue. It adds further validation to trading.