Update: Deal over.

Staedtler Double Ended Markers, Assorted Bullet Tips, Assorted Colors, 36/Pack – Link

Amazon has this currently marked down to just $10.92.

“Set includes double-ended fiber-tip markers with both a fine and bold tip for each color. Two pressure resistant tips maximize versatility and rich color applications when drawing, coloring and illustrating. Each marker includes one fine tip and one bold tip. Ideal for all ages and skill levels.”