Absolutely. If you want to even pretend to care about the environment, the very first step is starting to buy almost everything over $100 second hand. The added benefit is that it has lots of other societally positive effects! It has one of the very highest "sacrifices made vs. societal benefit" ratios there is. Please stop buying "environmentally friendly" gadgets and equipment and start buying "unfriendly" ones second-hand. There are very few categories of products where the efficiency gains made over the last decade mean you should buy new. Certainly less than 1% of purchases we make.

What matters is how long devices are used, not how often the owner changes.