This gorgeous 1960s aerodynamic test model of a NASA supersonic transport plane from the space agency's Langley Research Center can be yours for $5,685. On offer from Agent Gallery Chicago, it's approximately 51" long with a wingspan of 24" and "built of wood and composite materials." Unfortunately, one of the fins has snapped off but I'm sure the right person could work wonders with a little balsa wood, X-acto knife, and paint.
"RARE 1960'S NASA AERODYNAMICS SST MODEL" (via Uncrate)