A deal is a deal, you just admit you didn't respected it just because "you didn't wanted to". Stopping in the middle of a deal is scamming. He gived you ALL he wanted to give in the deal agreement FIRST, then you only gived him 8 of the 54 life the deal was. He would probably not done this if he knew you were only giving you 8 lifes. You agreed by going 8 then 8 then 8 etc... Right before you said your "mule" wasn't loading. You and him agreed on the TF2 items for 54 lifes. You stopped the trade after the first batch of 8 lifes. You didn't fulfilled the agreement on the deal, therefore YOU SCAMMED HIM.