Range from the cheapest Wallpapering £280 (Noels plastering paint & co based in ME7) to the dearest Wallpapering £400 (Felix Constantin Tiling based in ME3).
Comparing painter & decorators estimates for Wallpapering gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for wallpapering your rooms by posting your job to painter & decorators in ME7.