I pulled one iMac and four Mac minis out of service. I just finished upgrading my small fleet of older Macs. When that software can no longer be updated, it's time to toss the machine. With all the malware and ransomware, not to mention simple flaws that could cause a system to crash, it's become necessary to keep machines up to date - regularly updating both operating system and applications software. Looking for extra cash to finance your next shiny new tech purchase? We've gathered all the most convenient options for getting a good price on your unwanted devices. The best places to sell or trade-in your old tech gear