How to check, if Omnia i8000 is brand new, before buying it?

First of all HELLO to everyone, since I'm new here.


Now to the point:

I'm planning to buy a "new" Omnia i8000 from GSM Store/Service. The salesman says: "It's brand new and was never turned on", but who can tell?

So my question is:
Is there any way to check if the device was ever turned on or even used?

Round 430$ is quite a lot of money, so better be sure about what you buy...
Of course I'll be able to turn it on in the store, before I finalize the transaction.

Thanks for all answers and hints!


PS
Sorry for my english, but I hope you get my problem 

#2 is probably right.

$430 is a pretty good deal. mine is $550 back in December.