These are postcards sent to (or to be sent by) Astrocade's owners trying to get their business or offering warranties.

Arcadian Postcard Thumbnail

Arcadian Postcard - Order the Arcadian newsletter for just fifteen dollars... in 1982.
Montgomery Ward Postcard Thumbnail

Montgomery Ward Postcard - Return this postcard to the Montgomery Ward Cartridge Club for periodic mailing offering discounts for new cartridges.
Spectre Postcard

Spectre Postcard - Cartridge Warranty Card.