At least Woot is including a warning about these not receiving the next watchOS update. I would argue to try to purchase one that will receive those updates if you can afford it.
DO NOT BUY.
This watch is now End of Life.
Buy any other newer watch (including the SE).
The 90 day warranty does not give me the warm fuzzies about buying this refurbished from woot, however, that’s a part of the reason that the watch is cheaper than buying from Apple; after 90 days you’re on your own for any issues you might have (honestly - with the stories I’ve read in multiple different comment sections when these watches come up for sale I’d just buy direct from Apple - it might be more money but you’ll get a 1 year warranty on the device).