£18,000 to £35,000 depending on many factors such as size of estate, number of staff under him, landowners wealth, other duties etc. A lot also depends on how much the Head Stalker was willing to negotiate at the time he was employed as this is often the only chance he will get to influence his own salary. He will generally get a house rent and poll tax free but, again, this may vary from a cave to a mansion. A vehicle will generally be provided; it is normally acceptable to use this for a sensible amount of private mileage. Often work will be found for his partner.
Those are the things that are not really confidential as they can generally be found in job adverts or application packs. What is more personal is the fact that many Stalkers have certain other benefits/tips/opportunities etc; this is their business not ours.
Hope that this helps.
Glyn.