“Literally” would be an actual piece of equipment used for the collection of dust, commonly used in the woodworking industry.
“Figuratively” would be referring to any object one buys and lets sits around for great lengths of time unused, thus collecting dust.:fyi:
To the OP, you might want to try calling places like Rockler woodworking, Phillips Bros., or Tool Ranch and ask if they know of any places that might sell used equipment like that.