|$60 - Ronstan ClearStart|
Finding a countdown timer that doesn't have whole bunch of useless functions that invite disaster and also comes with a reasonable price tag is a pretty narrow search. However, the Ronstan ClearStart Sailing Watch is just the ticket.
The watch is usually available at West Marine, but at the time of this post they were out of stock. A quick Google search will usually result in multiple places to purchase this $60 watch.
The size of the numbers on the dial is really nice and big for folks who don't want to wear their reading glasses during the start sequence. Also, the 5 minute, 3 minute, 1 minute and then every 10 second beeps are nice and loud. You can set the watch to count up the time after the start to find your elapsed time - all good stuff.
West Marine did a great job of showing the features of this watch in the following video: