If you have an Amazon Rewards VISA credit card, you can take advantage of a credit-card-holder exclusive promotion, use coupon code TCH20ARC to get a 20% off discount on the current price of the GoPro HERO3: Silver Edition. The current price is $230, so the 20% off coupon will drop it down to $184. It must be sold and shipped by Amazon herself (not third-party sellers) and you must pay for it with the Amazon Rewards Visa credit card.
This is a limited time offer but an exact expiration date is not given (or I couldn't find it). This promotion includes 200+ different items sold at Amazon (terms shown there).
As part of this promotion, you can get the Google Chromecast for $28 (20% off $35 = $7).
Also part of this promotion is the Roku 3 flagship (20% off $95 = $19; purchase price $76!). Also the red Pebble Smart Watch (20% off $130 = $26; purchase price $104)
Please note, the product prices can change at any time. The promotion is a 20% off discount on the live prices.
Please also note that the maximum savings with this promotion are $50. In other words, it phases out on shopping cart purchases above $250. The best way to find out is to add items of interest to your shopping cart, enter the coupon code, and see what happens at the top right corner of the Amazon Checkout page where you see the post-coupon totals.
Please also note this promotion is only good for the Amazon VISA credit card. It does NOT apply to the Amazon Store card (not a VISA).