Join Date: Nov 2011
Location: Guernsey, Channel Islands
Programs: BA Bronze, HH Diamond, A-Club Plat, Club Carlson Gold Elite, Marriott Gold, IHG Spire Ambassador
Posts: 354
The Nor1 upgrades aren't available for all Hilton hotels, but certainly (in my experience) a large number of them.
No, the prices aren't fixed. They can vary by hotel due to the broad range of rooms available.
Chris