I got to a point I was one of two people with the Mechano-hog on my server (Back when it cost 13k gold which was a lot). And was selling WoW gold to my college roommates...I don't remember the figures but I think it was $1000 gold for 20$ at a time. Those were the days!
Seems like there aren't many games out there to make money off of now. I never got into that Runescape crap lol.
Ya I remember some of my classmates talking about selling characters for 100's of dollars before lLizzard added the instant level boost. Man I missed out on that boat. my money mostly came from mining and herbing but had a friend who made sick bank as an enchanter... it helped im sure that we just gave him all the loot we ever found if we didnt need it.. we got free enchants but he got rich!