Do old computers have any value?

Are old computers still considered to hold any significant value in today's digital age? With the constant evolution of technology and the emergence of newer, faster, and more efficient models, does the resale or reuse of older computers still make financial sense? Or do they merely occupy space and collect dust, serving no purpose other than nostalgia? Let's delve deeper into the topic and explore the various factors that may contribute to the value of an old computer, from its hardware specifications to its potential for upgrades or repurposing.