Sounds fun.
I don't actually own a Nintendo DS but might consider buying one: this 'game' would be a justification, so to speak...
This is sort of off topic so quick, terse replies pefectly acceptable (or mail me).
I had a quick look on AmazonUK and the price varies considerably with the colour of the thing!
Are they all the same? apart from the colour? Personally I don't care what colour it is so I'd rather spend less than GBP100 for the Turquoise coloured one than GBP176 for the silver one! An extra GBP76 just for a silver colourd one seems a bit over the top: if the guts of the thing is actually the same?
As usual ebay new prices are more than Amazons and second-hand only about 10GBP less than Amazon new: why do people pay more on ebay, beats me. (no repllies necessary about ebay).