doing detailed world machine/worldpainter commissions starting at about $75 for 4k^2 maps and going beyond $100 for 8k^2 and above.
prices may seem steep but a good world takes a lot of time to create and populate, and the larger i go the more time and effort it takes to make something. if i spend 20 hours on a 4k map and charge $75, i'm still only getting paid $3.75 an hour
for non detailed work, for example just heightmaps etc, i will charge a lot less, as that takes far less time
if you're not looking for commissions, then uh uhm uh hmmm ummm pull my finger