I used to do it now and again for $15/hr. This was a few years ago. After a few clients, I stopped doing $15/hr unless it was at least 2-3+ hours worth of work. It really sucks doing 1 hr's work, travelling to the location (lose money in transportation), and only making $15. People would call me for retarded stuff I could fix in 5-10min, and I'd feel bad charging them a full hour, or sometimes they'd make me stay another 50min and find other stuff that was wrong which I didnt want to do. I dont have any clients anymore, but if they would come, I'd charge $20-25/hr minimum, with at least 2hrs worth of work (which is a pretty good deal if you know your stuff and can do it quickly). If some good, old clients came back, or a client who could bring me 3-4+ referrals, I'd let them slide with the old $15/hr price, but I'd let them know that the referrals would get charged the $25/hr. Trust me, if you price too low, they'll call you every day, expect free phone support (omg i hated this), and pretty much just annoy you to no end. Keep it moderate, but not too expensive where they wont come back.