Basic sketch SFW EXAMPLE - $15
Finished and cleaned linework NSFW EXAMPLE - $20
Colour with no background SFW EXAMPLE - $30
Vague background SFW EXAMPLE - $35
Slightly detailed background SFW EXAMPLE - $40
Detailed background SFW EXAMPLE - $50

For more than one character -
Vague background characters are $5 each
Detailed extra characters are $10 each

Reference sheets, which include front, back, and side views of the character, as well as several emotion shots, and a vague background SFW EXAMPLE - $80 minimum