I think some of the vendors have their employees sitting online 24/7 grabbing this stuff as soon as it's posted
I agree I think a lot of mags from midway , brownels an others who did not gouge went straight to gunbroker or shows once bought
back when CFS had deals on kits every time they had a offering the same stuff was on gunbroker with in days for much more.
if I had a way to buy 50,000 SR primers I could buy an resell in minutes regardless of my cost as long as it wasn't stupid money .
Im sure there are guy scour scour ads an sights every day just to resell on GB or ebay every day.