N900 XTR is currently available on the DVLA website for £255 if you don't mind looking like one of those twats who buy a reg because it looks vaguely like the reg they couldn't afford.
Here in South Dakota a personalised number plate costs...$25
the maximum letters/numbers you can have is 7 and on the yearly tax you just pay another $25 ontop of your yearly tax and it's at the renewal you can get one
Last year I had WOBBLY1 and so I now own that but this year I am tempted to try something retro.
I am sure someone on here took a picture of a car with the M900 XTR number plate. Done a quick search but cannot find it. Tintin40 rings a bell as the person that posted it.