Newer laptops may all be soldered down to make upgrading difficult, but if you've got an old one that's falling behind, there ...

The Dell Inspiron 15 3530, a laptop with the 13th-generation Intel Core i3 processor and 8GB of RAM, is part of Dell's Black Friday in July sale with a $150 discount.

Devices that still hold value are refurbished and sold into markets like education or low-income enterprise, extending their useful life. Components like RAM or screens are harvested for repair jobs.