Thank you for asking! I do this for a living at the moment. And good art takes me a lot of time to make ^^
I've lived in places where a normal income is less than 200$USD a month, and in ones where it's 3000$USD or more. This is baffling and confusing. Right now I'm somewhere between, and the prices I charge give me a modest hourly wage that doesn't really allow that much in life. Hopefully it will get better ^^
I have had commissioners who demanded to pay me more for a picture since they felt my prices were unfair to me. Fascinating!
There are plenty of artists on DeviantArt who do commissions for 5$ or 10$, so no need to wait, maybe you can find one whose style you like ^^