Thinking about getting a Samsung Galaxy watch. I have never had a smartwatch. Can I buy one of these old watches used off Amazon for like half the trade-in value and trade it in for the deal? For example, I found an Amazon Renewed™ Galaxy Watch 6 Classic for $120. Can I buy that for $120 and trade it in for $250 off the Ultra? Is it really that easy? I even live like two blocks away from the post office lol.

Also general thoughts on Galaxy Watches? Specifically going for Galaxy because they have some FDA-approved sleep apnea tracking thing. I do not have a Samsung phone.