Office Depot and OfficeMax offer the Sharpie Ultra Fine Permanent Markers 24-Pack in Assorted Colors, model no. 717800, for $10. Coupon code "22654468" cuts it to $8. Opt for in-store pickup to dodge the $9.95 shipping fee. That's $2 under our mention from last summer and the lowest price we've seen. (It's also a current low by $2.) These markers' nontoxic ink is quick-drying, smear-proof, and water-proof.