Apple watch 10 is 299.00 several places over the last few weeks. Most recent Walmart and Costco
I’d need to buy an Apple phone 1st, but good to know.
This is GPS and cellular, usually about $40 more. Not apples to apples.
Is it unlocked? Or network specific?
These are listed “(New)” so it should not have been registered with any Apple Account.
AFAIK the Watch pairs with an iPhone and uses the cellular account the iPhone is on. For example, you have T-mobile, you contract with T-mobile to have this additional cellular device on your account. I hoped to do this with Tello, but Tello doesn’t support the Apple Watch at this time. 
Ik doesn’t that suck. I found a perfect condition Nike edition apple watch reset it and I can’t use without watch🥺 I let my friend use it for now.