I made approx 1K GBP as a young teenager trading in RuneScape prior to the introduction of the GE.

Haggle people down to say 6 mil for a party hat I'd sell for 6.5, repeat, when I quit the game I sold it all on eBay, my mum was rather surprised when the money came in.

Hourly rate? Awful.

I very much doubt that I'd be where I am today without that experience though.