It's not unusual for someone to sell a new, unopened item or two on the classifieds. I've sold one or two myself of stuff I'd bought in the past, never used and figured someone else would get good use out of something new (kudos to you, mini disc player guy who in hindsight probably made a killing off of the unopened music player we sold you last year

)
Important also to keep in mind that we're getting into the time of year where you're seeing an uptick in ads as a lot of folks do a "spring cleaning" around the house. Without seeing the exact ads you're mentioning in the original post, its possible that someone is simply clearing out their cabinet of items that have piled up that they haven't used and that's one of the great use cases of the classifieds.
What I try to avoid are situations where someone has a source for large quantities of new product on the cheap, they buy that new product in large quantity (on say eBay) and then turn around and sell it in large quantity the classifieds to turn a profit. If it happens once it could simply be a case of buying more in a lot than one ended up needing, which is cool. If it happens often it starts to get out of the realm of selling personal items and into the realm of operating like a business if say selling new iPhone cables every week as opposed to selling one or two new cables they had to have lying around that they haven't used. If you see a situation of regular new items from the same person, please don't hesitate to drop me a report and I'll take a look!
Edited by Adam, 2016-03-23 11:46:27