Did you even read the OP? I said New not used resale! I'll admit that most BNIB ones I sell are 10% off the cheapest online source however the Manix S110V & Chapparel I sold last week were 5-6% off.
BNIB implies that the item has been opened, at least inspected, maybe used but with no wear, etc.
It is not NIB from an authorized dealer, or it would have said so, and BNIB would not exist as a selling phrase.
But, having read more posts, I see what you are getting at, and tend to agree, as many BM models do not seem to hold their value as well as other models and/or brands...