REI offers the Spot Gen3 Satellite GPS Messenger for $74.89 with free shipping. That's tied with our mention from last December and the lowest price we could find now by $45, excluding the below mentions. (Most retailers charge at least $149.) It allows you to reach emergency responders, check in with family or friends, and share GPS coordinates. Features include motion-activated and continuous tracking options, a customizable tracking rate, and water resistance up to 3.3 feet. Four AAA batteries are required, included. Deal ends December 31.

A close price: Several other stores offer it for $74.99, essentially matching the above price, including Fry's and West Marine with free shipping, and Cabela's via in-store pickup.

Note: This device requires a service plan for operation, starting at $199.99/year.

Update: Note that this item is temporarily out of stock, but can still be ordered at this price for delivery when available.