ETA: I now have an airbrush!! So if you need gradients or just prefer an airbrushed pony I can now do that for you!!
Custom pony commissions are usually priced on a case by case basis depending on what you'd like done and what accessories, if any, are needed.
A full body repaint with new eyes, new symbol and rehair usually run at least $30. Possibly more depending on difficulty of the painting and hair style.
The oriental style ponies I've done usually run about $50 as the hairstyle uses almost twice the amount of a regular rehair and I use swarovski crystals and make little accessories for the hair.
Ofcourse if theres sculpting thats goi