I've been asked a handful of times the question every person selling their skills wonders: How do I price my commissions? I've heard from many people on this subject, and since writing this guide back in 2015, I have a better understanding of how a person should price their writing.
The biggest question you should ask yourself is this: Am I writing for fun or do I need money for bills / school / etc? This is the main factor that should determine what you charge.
I encourage every writer to charge what they feel comfortable with. If you feel your writing is worth the big bucks, go ahead and charge that. If you're still learning and want a little extra pocket change, plus improve while you're at it, charge the amount you think your writing is worth, whether that's 5$ or less; no one should make you feel like your writing isn't worth money.
However, if you need money for important things, I'd highly recommend selling yourself on more places than deviantART. Sell yourself on