REI offers the GoPro HD HERO4 Silver Edition 4K Action Camcorder in Silver, model no. CHDHY-401, bundled with a $50 REI Gift Card for $399.95 with free shipping. (The bonus card will add to cart automatically.) Assuming you'll use the credit, that's essentially tied with our mention from three weeks ago, which included a $50 Amazon credit and microSDHC card, and the lowest total price we've seen. (It's a current low by $40.) It features up to 4K video recording, up to 12-megapixel photos at 30 fps, waterproof housing (up to 131 feet), WiFi, and Bluetooth. Deal ends December 24.
Of note, REI members get a $40 credit with this purchase. (Not a member? Buy a REI Lifetime membership for $20.)