Due to the quality of services the price varies greatly. The person that pays $2. per bird then can't understand why the bird still has some entrails or lungs in the bird, or many broken legs, and or torn skin. The service provider that charges by the unit tends to cut corners over the provider who charges by the hour. Ask for references. Look at the facility, Is it licensed? Is it clean? Do they refrigerate? Do they provide bags? Ask what their procedure entails. Is there a Mobile Poultry Processing Unit available? Ask your County Ag Extension Service for help.
$3/bird here in Oregon if only for personal/not for sale use. I don't know what it would be for the small scale commercial farmer. We do our own now because we want to be sure we get our own poultry back.