I do not think a second hand M2 Macbook Air would be much cheaper than $850. And with a used laptop, battery life could be a question mark. I think in this case there is a case to be made for a $850 Macbook that lasts a whole day without inducing a battery anxiety.
If it throttles 50% the price should be reduced 50%. Don't bother people, moronic design that should have had cooling fan. Just buy a second hand M1 or M2 based Macbook Air/Pro.
The 2022 Apple MacBook Air 13 featuring the base M2 chip with an 8-core GPU is currently down by a sizeable 15% on Amazon and Best Buy. The discounted MacBook Air 13 price of $849 is an all-time low, making this an excellent opportunity to snag one of the best daily drivers on the market.