Depends where in the world you are.
this information always helps with queries like yours. If you're in the UK i suggest you try some magazines; Classic Bike Guide usually has a considerable number of bikes for sale, so you can use those as a comparative for your own.
If you're in Australia I can give you the gist of the market
If you're in neither of these places I can't help
Generally speaking, neither bike is at the more 'collectable' end of the scale (unless the norton has a featherbed frame, which i doubt), but theyll sell easily because theyre still nice bikes. once we have your location and hopefully a few snaps im sure somebody here can give you an honest estimate