You can start using the following the drop to as low at 430$ish..
Using the welcome 10% in Samsung Store app
BF2024 will get you $100 off
Trade in a phone - used my old S9 to get 55$ + 300$ tradeboost
$959.20 - 100$ - 55$ - 300$ - 10% (50ish) = 430$ish
I added a strap to bring it to 530$ to get a 100$ off from Amex.
My math is a bit bad.
Caveat: if you go to the website it says 100$ trade-in but if go to the item itself it says 300$
looks like they fixed the trade in error for smartwatches and tablets
Have a chat with an agent and they'll give you a 10% code and a $50 code, trading in watch 4 classic $45 + $300 boost + 10% + $50 brought it down to $377.36