ThinkGeek takes an extra 20% off Razer Battlefield 4 Collectors Edition Gaming Peripherals, which are already marked up to 67% off, via coupon code "FIFTHOFF", as listed below. (The coupon also works on a wide selection of sale items.) Shipping starts around $6, but orders of $75 or more qualify for free shipping. The deals, with prices after discount:
Razer Battlefield 4 Destructor 2 Mouse Pad for $15.99 + $7 s&h (low by $16)
Razer Battlefield 4 Taipan Mouse for $31.99 + $6 s&h (pictured, low by $16)
Razer Battlefield 4 BlackShark Headset for $39.99 + $7 s&h (low by $13)
If you're at least 62 years old, you can score a $10 lifetime pass to America's federal parks and recreational lands. But act quickly because fees are about to jump.