Portraits

I have drawn portraits before, but haven't tried making a living of of it until now. Over the last few days I drew 2 portraits in different inking style and priced them according to the time it took me to draw them. At the moment they are actually very cheap as far as portraits go, in the future I'm planing to increase the price though, I mean honestly, $50 for a portrait? Thats just too cheap, but I have to start somewhere.