If it is 'new' it is probably one of the Chinese fakes which take a repaired or reflashed system board and wrap it in a new locally made LCD and plastic case. This creates an unfortunate situation especially for Asian N900 owners who have to compete with the fake new market to resell their N900s many in good used condition.
Depending on the problem they had to fix you could have a great N900 with a few more years of life still left or like me spend $250 on one that was wonky and full of non-functional apps. Mine took half a flash before perma-bricking (won't enter USB flashing mode) after about a week of ownership. Best of luck with the new phone until there is another truly great hackers gadget to supplant our N900.