Department of Redundancy Department

At the grocery store yesterday: a sign advertising a special price for "DRIED PRUNES."
Do they cost more or less if they're not dried?

Which led to a discussion with the cashier, who pointed out that he always notices when a package from the meat department comes through: "Ground Buffalo."
He wonders if there are other kinds of buffalo, like Tree Buffalos.
I pointed out to him that Ginger saw a story on TV about a marsupial that lives in New Guinea called the Tree Kangaroo. It is a kangaroo that lives in trees. So . . . if a kangaroo can live in trees, can a buffalo . . . ?