Price depends on how complex the background is.
Draw same character with different pose:
+200 for a sketch.
+800 for a digital drawing.
+900 for a digital drawing with shading.
+1000 for a digital drawing with shading and colored outlines.
Adding a different character to the drawing :
+300 for a sketch.
+900 for a digital drawing.
+1000 for a digital drawing with shading.
+1100 for a digital drawing with shading and colored outlines.
A very complex designed character may cost extra
Almost any character, being either OCs or franchise characters
Almost any pose
Not too complicated backgrounds
Porn or fetishes (slightly sexy is okay)
Extreme/realistic gore (cartoony gore is okay)
Ponies (humanized is okay)
FNAF characters (humanized or anthro is okay)
Vehicles like cars or trains (I'm not very good with these)