This is just false. There are "grey markets" for basically any major product. Quality King Distributors is one company that dominates this space and has been sued many times (they win nearly every time on the basis of the first sale doctrine and are responsible for [this](https://en.wikipedia.org/wiki/Quality_King_Distributors_Inc.....) case) for undercutting manufacturers. Example: Dollar General sells some prepaid phones at prices substantially lower than on eBay/Amazon but in limited amounts per customer. Companies will hire a bunch of runners to go buy the max amount of these phones to resell (or unlock and export to other countries). Or: "Diversion"/products that are intended to be exported to another country actually being reimported, liquidations/bankruptcy auctions etc.

Lots of manufacturers and distributors who play by the rules don't like this because grey market distributors will undercut MSRP on places like Amazon so they will report the listings as fakes to get them removed.