I make about 0-300k/year fixing apps that others either weren't able to finish or where they architected themselves into scaling issues. Aside from that, I am a part time programming consultant who makes about 80k a year (I have a chronic illness so I spend a lot of time not working, and it's helpful for me to work in intense bursts with rests in between. It's difficult for me to have normal full time employment in the US because of the chronic illness.)
It averages out to about $250k/year on 30/h/week