Mwave offers the HL Components Battery Grip for Canon EOS 550D1 for $34.99 with free shipping. That's the lowest total price we could find by $13. It features a shutter release and can hold up to two LP-E8 battery packs simultaneously as well as six AA batteries.
Mwave offers the GSM Outdoors Nite Stalker Pro Combo Electronic Caller, model no. GSM-WRC-0207, for $338.99 with free shipping. That's the lowest total price we could find by $28. It includes 400 pre-loaded game calls, 250-yard long range remote control, and the Deceptor Rabbit Decoy. It requires eight AA batteries, and the remote requires a 9V battery.