(But, indeed, you won't get those for like $20-$30 you can get non-gekoshered ones.)
I found this one that looks like a decent option.
+ Has no radio (it's not in the product listing/details/description, and confirmed in the Q&A by several answers)
+ It is cheaper than any of the "kosher" ones (it's now $31.5 after the 10% clip coupon, but it was already $30 and even $23.5 at one point)
+ USB-C (Micro-B is the worst, most fragile, connector ever)
+ Comes with 3-year warranty (though not sure what it covers or how responsive they are)
- Has no built-in speaker
- 16 GB built in is not much (but can be used with an SD, so not a big deal)
https://www.amazon.com/MP3-Bluetooth-Headphones-Expandable-Majority/dp/B0BXXF1VHZ