This ad for Towers (A Canadian chain of department stores) from December 15, 1980 has some pretty swell deals going for it. Highlights include Mego 12" Superheroes for $4.95 each, Remco Utility Belts for $3.22 and the Hoth Ice Planet set for $10.50. This didn't help me much as a kid, we lived far away from a Towers location, however it was the first place I played Space Invaders.
But wait! There's more including some smoking specials on Mego Micronauts which sadly were being discontinued that year. A Hydrocopter for $6? My grandmother paid full price!