To save money?
Options:
Ebay?
Facebook?
or Craiglist?
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I found this post: 10 Best Places to sell GPUs for best cash returns
published by buysellram.com, a used electronics buyer, who buys various computer parts. Check the links if you are interested in it...
How to sell used memory RAM? 
How to sell used processors CPU? 
How to sell used GPU graphics cards/video cards? 
How to sell used hard drives SSD drives?