I agree with the other poster. Not only is Intel Mac on the way out, the the Apple silicon chips are SO much more efficient in Macs, leading to longer battery life and less ram usage while doing stuff.
Best Buy has the base M3 MacBook Air on sale for about $750 right now. If you're dead set on used, they have a handful of refurbished M1 Air and Pro models starting around $500.
Beautiful Stories from Anonymous People was my first podcast love. I haven't listened in a while, I should really get back into it...