Buffalo Bills -- We Would Never Troll Tom Brady ... As Pumps Fly Off Shelves

The Buffalo Bills are NOT taking shots at Tom Brady's Deflategate debacle ... they're just innocently trying to sell some ball pumps, and it just happens to be the same week Brady's coming to town.

Yes, the citizens of Buffalo know a joke when they see one, because the Bills team store can barely keep the pumps on shelves. Of course, it looks like a brilliant piece of trolling, but the store insists it's not.

The manager tells TMZ Sports it's not like they started selling the pumps this week -- they've been doing it since the start of the season ... when they knew full well Brady and the Pats were coming to town in week 2.

He does admit, "No one bought them until this week. Now they're going fast."

This has Rex Ryan's fingerprints all over it.