Edition 30 interior seats are around £600-700, Knob would be around £50-100, steering wheel £150-360 depending on condition.
Strip off the GTI and edition 30 exterior badges and you could probably get £2000-3000 for it if you refit different seats etc. So end up being say £800 side up or the ed 30 interior
But if you do part it out I'd be interested in the steering wheel controller and maybe some of the interior silver trims