You can search commissions to see what open threads pop, and what prices they offer! It varies per shop. 
I do commissions as well, you can check out my Commission thread for more examples. I’ll also share an example of my work and my own prices below.
Price Chart
This needs updated. The bottom part is supposed to be “each extra character is 50% off their own total cost”.
*You’re also more than welcome to pm me to get a price estimate. You’re under no obligation to pay or follow through if you want to still look around 
And some other commission artists that I think are still open: @ZamiraArts @Geta @dishsoap @Jellishfish @talina.writes