Like i said on my post, i sold 200$ in the last 2 months, one of the pieces was a manticore for 75$ and a couple average gear. Way hard then it was before, just to give an idea how easy was to make gold at the beginning, look at this:
And back then i sold a lot of items like that. Today i've no idea if there are people making tons of gold, but back then it was really easy if you could farm act3/4.
All that said, i agree with Traem, maybe you can't take Diablo 3 as a job, cause its not profitable enough, but i guarantee you can make extra cash just playing for fun.
Just my two cents :P