$300 - 18 x 24 inch drawing. This is what I typically do each month. Send me 12-15 different places and I'll put together the collage. Takes about 40 hours spread over a month (cause I have a day job).
$100 - 9 x 11 inch drawing. Takes 10-12 hours. Once again, send 8-12 locations.
$25 Each - 10 x 10 inch acrylic cartoon portrait. I typically like to do four at a time so I can work on portions as the others are drying.