Amazon has a variety of Nerf products on sale for up to 82% off as a Deal of the Day.
Examples:
Nerf Rival Nemesis MXVII-10K (Red) — $49.99 (50% off)
Nerf Zombie Strike Dreadbolt — $17.49 (65% off)
Nerf N-Strike Elite DualStrike Blaster — $9.65 (52% off)
Nerf Rival Atlas XVI-1200 Blaster (Red) — $28.27 (29% off)
TerraScout Nerf Toy RC Drone N-Strike Elite Blaster — $147.19 (36% off)
Nerf Rival Prometheus MXVIII-20K — $85.00 (57% off)
Nerf N-Strike BowStrike Blaster — $4.89 (82% off)
Link to All Nerf Products
Shipping is free for Prime members.