I sometimes do commissions. I am rather picky about who I work with though. With people I know well and trust I operate under a “pay what you want” system. With people I don’t I will carefully gauge the time I am putting into a work and give you a fair price for the effort I put into it. Generally that price is the absolute lowest I can go while maintaining some self respect. I’ve tried working for less before and it generally results in poorer work if I don’t feel I’m being properly compensated.