Well, my natural colour is sludge brown with LOTS of grey, I had however dyed it myself for well...ever with whatever colour I liked the look of at the time, so it was a combination of sludge brown/greyand 15 (approx) home dye colours. Now it's silver blonde. I'm going lighter yet to fully silver/white, but at £100 a go, it's having to wait till after Xmas. I must add as well my hair is almost down to my bum,so there's a lot of it too.
So as i said, so far its cost £400, which to me is an eye watering amount of money just to spend on my bonce, and I didn't feel it necessary to to pay extra as well, lol.