Is there any way to find out if these are the models that still have the O2 sensors?
The blood oxygen monitoring feature is only available in the Apple Watch Series 6, 7, 8, and the Ultra released in 2022.
Has anyone ordered this item got shipped? Mine hasn’t shipped for few days
Hi there. These ship direct from our vendor so give it a few more days.
We promise free shipping with Prime, not fast. 
Is this returnable if cosmetic damage is too much or the battery just doesn’t work?
Yes, it is.
Thanks! Is the return shipping free with Prime, I.e just drop off at a UPS store?
Yup!
Just Received. Very satisfy with the condition. Minor scratches on the side but the face itself is perfect!!
Received two. Came in generic packaging and recycled bubble mailer. Both show 92% battery health, which is better than I expected. The blue one had no body scratches but the screen is pretty scratched up. The black one arrived green and the body has several scratches on it but screen seems perfect. Since batteries are good, I am going to put covers on both and they are going to look good enough for my soon to be 12 year old twins as first device they have with voice/text capabilities. I expect at least 1 to be lost in the first 6 months so not worried in the least about the scratch condition, especially body. Very happy with the battery health. Hopefully not hacked/spoofed.
Update 3/2025 - now going to activate and find out that one of them is not cellular, only GPS! Ooof!, now a useless expensive paper weight.
Luckily, these have
Warranty : 2 Year Woot Limited Warranty
click the link and reach out to them. Any issues, reach out to woot customer service.