400mm F9.5 Binocular Reflector Telescope For Sale

You can be 2nd owner of this telescope.

The mirrors have a focal length of 3.8 m and a diameter of 40 cm. Each mirror consists of 118 nested pairs of reflectors. Each reflector consists of 0.017 mm thick aluminum shaped into a cone, coated with an acrylic lacquer to form a microscopically smooth surface, which is overcoated with gold to enhance reflectivity.

http://www.ebay.com/itm/Broad-Band-X-Ray-Telescope-BBXRT-Space-Shuttle-COLUMB-/320632933132

That could be the poster child for a White Elephant. You'd need a launch vehicle to get it above our atmosphere.

Clear skies, Alan