One of my 80mm silver aluminum mesh fan filters*! I'll even clean the dust out for you and shine it up nice! But really, with dust composed primarily of genuine Black Hills dirt and ponderosa pine pollen from the most beautiful place on Earth, who wouldn't want the dust?!
*Pickup at my Deadwood, South Dakota offices only. Otherwise, a $2.50 shipping & handling fee applies. Offer invalid in Guam, Laos, and North Dakota. See Bob Barker for details.