Depends on where you are, GarNiac. Location, location, location.
In the US, PetSmarts are everywhere, and 3-4 inchers are 6 to 7 bucks. Most places I have seen within 200 miles of Spokane(I range around a little), that have even had senegals, 6 inchers were 15 to 20 bucks, 20 being most common.