Prepare the herb rub; combine sage, thyme, marjoram, and salt in small bowl.
Preheat oven to 180°C.
Remove neck and giblets from turkey and set aside.
Rinse turkey in cold water and pat dry with paper towels.
Stuff turkey with celery, carrots, and onions; tie legs together with kitchen twine.
Rub turkey with butter and herb rub. Scatter remaining onion quarters and carrot pieces on bottom of a large roasting pan; add turkey neck. Place turkey on a roasting rack in the pan.
Cook in preheated oven, basting frequently after the first hour, until turkey is golden.
Cook for additional 2 hours or until juices from thighs run clear.