When buying the Galaxy S24 Ultra, the most recent Galaxy phone Amazon will accept for trade-in is the Galaxy S21 Ultra, which it priced at $135. Samsung values the exact same handset at $600. A mind-bogglingly large gap in valuation between the two companies.

Act fast: the Samsung Galaxy Watch 7 is now 21% off at Amazon and the cheapest it has been since its release in July this year.

Whether you want a massive, ultra-wide gaming screen or a simple monitor for your home office, these Prime Day deals will save you cash.