Unused: stuff which can be in just about any condition, really. It's just a claim most of the time..
Original packaging (or price tag, etc): the product/packaging can also be in any condition (used or unused).
Anything claimed to be "mint" or "MIP" (mint in packaging) or "NIP" (new in packaging) or "NOS" should be in pristine condition, and have of the associated packaging and literature that would accompany the item when it was sold in its day. It should present itself as a perfect item off the shelf just as you would expect from something new today. Anything short of that is not true NOS in the high end antique business. The way an esteemed broker explained it to me once was using a currency analogy. A coin is mint when it is minted and hasn't been circulated. Even if you didn't spend it on anything, it might still be scratched up. It's no longer mint. People not only overuse these terms, they abuse them. It makes it hard for dealers/collectors to make sense of the nonsense.
Original packaging (or price tag, etc): the product/packaging can also be in any condition (used or unused).
Anything claimed to be "mint" or "MIP" (mint in packaging) or "NIP" (new in packaging) or "NOS" should be in pristine condition, and have of the associated packaging and literature that would accompany the item when it was sold in its day. It should present itself as a perfect item off the shelf just as you would expect from something new today. Anything short of that is not true NOS in the high end antique business. The way an esteemed broker explained it to me once was using a currency analogy. A coin is mint when it is minted and hasn't been circulated. Even if you didn't spend it on anything, it might still be scratched up. It's no longer mint. People not only overuse these terms, they abuse them. It makes it hard for dealers/collectors to make sense of the nonsense.