I noticed the Casio PRG270 Pro Trek triple sensor (altimeter/barometric pressure, compass, temperature) solar powered watch is at Costco for a great price of $79.97. The .97 ending price means its on discount if I remember my Costco deal tips correctly. It's available both from Costco.com [costco.com]
and in store. Obviously you'll need a Costco membership to get this deal.
Price-wise this is the cheapest I've ever seen this watch. Looking at the historical price on Amazon it only reached $79 for a brief time a year ago and is typically around $110 or more. Reviews of the watch are good and it's one of the best value ABC (altimeter-barometer-compass) watches that's also solar powered. One of the very few solar powered ones with Casio's latest sensor engine (the only other ones are well over $500). Great watch for hiking, mountaineering, etc. However make sure you know the limits and quirks of barometric pressure altimeters. This isn't like a GPS watch that locks on and has a very accurate reading, it needs to be calibrated periodically and will be influenced by the weather (which is a good thing, it can warn you when a storm front is coming in while out on a hike).