This intresting as I assumed demo stock was regular stock used to demo. Then sold at some point, usually at a discount.
But, it appears proper demo stock is bought by dealers specifically as that. And I assume at a significant discount from naim.
I have bought ex demo in order to get a better deal with my dealer, but I can’t see any " marks" to suggest its any different than a regular item. In fact, when I registered my ex demo 2018 xpsdr ( bought in aug 2020), naim confirmed the warranty is until Aug 2025.