The warehouse lady has a boss presumably. And the boss might be annoyed at the diminution of value for the items going to auction.
If pallets normally bring say $100 each but by letting the stroller lady consolidate the strollers into one pallet that she'll pay $250 for, everybody won.
All of the other places are cherry picking and reorganizing pallets to elicit higher bids and tend to run their own parallel retail / resale operations. It's probably necessary though because the guy selling directly off the truck went out of business last year.