I hope this is not a repost but w/e jk.
1. A buddy and I took a pic of Me putting 20g into trade window and him putting epic item.
2. I took a pic of the trade completeing next he gave me my gold back and I gave him his item back.
3. Now i opened a tickect saying after the trade i didn't recive the item and my Buddy dosen't have it and he didn't recive his gold.
4. After a while blizz sent me another one of the item's and him another 20g!
Also another way to make gold is find a "NICE" person on your sever have about 2 OR 3 alts. Two of the alts should be under level 15 and the other under 40, With a low level I asked a lv.70 for 10s for a guild....SHE GAVE ME 10G! Next log and ask again on the other char. but say something like I need this or that.
At the end of the day i made 70g!