Certain to sell out long before the end of Amazon's marathon Prime Day, the two sizes of the latest Apple Watch are on sale for $120 off.

That said, it’s easy to overspend during Prime Day. So before you go crazy on the deals, make a plan. “I would suggest making a list of things you need and then a few loose gift ideas if you need birthday, wedding, or grad gifts,” says Trae Bodge, a shopping expert at truetrae.com.

There are a surprising number of Prime Day Apple Watch deals right now, with discounts as high as 30% We found the best deals on models like the Series 10 and Ultra 2.