I am a retoucher in the Chicagoland area. I usually retouch boudoir and portrait photography.
Minor retouching: teeth whitening, eye brightening, scars and mole removal, the little things, as well as color correction, sharpening, and other global adjustments are $5.00 an image.
Medium retouching: all over skin softening and corrections, tummy tucks, arm and leg slimming, waist contouring, small removal of background objects on top of all the minor retouching is $10.00 an image.
Major retouching: 3 or more people in one image needing the same work as above, swapping body parts and large scale object removal, and other complicated manipulations are priced on a case by case basis.