Amazon offers Prime members the Nerf Rebelle Heartbreaker Bow in Flame for $8.20 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.48.) That's a buck under our mention from this past summer and the lowest total price we've seen. (It's a current low for any color by $7.) This bow can fire darts up to 75 feet and includes five darts.
Update: The price has increased slightly to $8.68.