How many $60 headphones work with Google’s version?
It's oddly difficult to find solid answers to this with a web search, but it appears that it just needs protocol support, not a mic that meets specific standards. The (discontinued?) JBL 110GA is $40 on Amazon.
Which I’m not able to find on Amazon…
https://www.amazon.com/gp/aw/d/B07G2LXMDV
7 year old used headphones with one in stock using Micro USB in 2025?
All of them.
Not according to the official specs….
It's oddly difficult to find solid answers to this with a web search, but it appears that it just needs protocol support, not a mic that meets specific standards. The (discontinued?) JBL 110GA is $40 on Amazon.
Which I’m not able to find on Amazon…
https://www.amazon.com/gp/aw/d/B07G2LXMDV
7 year old used headphones with one in stock using Micro USB in 2025?
All of them.
Not according to the official specs….