Rare? Rifle Brigade cap badge

[Nozzer]

Picked this up the other day. I don't really collect anodised badges, but I am told that it is fairly uncommon. A search of the forum is frustratingly vague to say the least and I don't have access to my copy of "No Bull" at the moment. One thing I do know is that these super shiny badges are very difficult to photograph, regardless of background...

This badge will possibly be put up for sale at some point soon and a high end, low end price would be very useful, not something I have asked for before.

Many thanks,

N