This is a little bit different for me. Ibraim Roberson is one of 5 artists in a studio in Brazil called The COMICOMMISSION STUDIOS.  They do some nice work & I would like to see them get a few more commissions out there. Shipping on orders from them is $20 if you want it shipped as soon as the commission is complete.  If you are willing to wait until I can have a few shipped to me at once from Brazil, I will knock the price down to $15. Prices are as follows
Pencils
Size - 9x12 - $55.00 - One character and Generic Background
Size - 9x12 - $75.00 - One or more characters and Full Background
Size - 11x17 - $90.00 - One character and Generic Background
Size - 11x17 - $110.00 - One or more characters and Full Background

Inks:
Add $20 (size - 9"x12")
Add $30 (size - 11"x17")

Color Commissions
Size - 9x12 - U$ 110.00 - One character and Generic Background
Size - 9x12 - U$ 150.00 - One or more characters and Full Background
Size - 11x17 - U$ 160.00 - One character and Generic Background
Size - 11x17 - U$ 250.00 - One or more characters and Full Background

Here's a quick look at Ibraim's process in creating a commission.