I just got a job doing 3rd shift grocery stocking, usually they don't allow earbuds but there's no customers so everyone does it anyway.
I'd like to get something ~$30 or less (I don't really care about the sound quality so much as long as it doesn't sound terrible), and battery life lasting at least 8 hours. Wireless because I don't want the wire getting in the way of anything or feeling weird down my shirt.
With that budget I'd probably find something popular on AliExpress with good YouTube reviews (and good seller reputation). Sometimes it's something you can get on Amazon, but it's 30-50% cheaper.
Like look at these ones: https://www.aliexpress.com/item/3256804804467430.html
Are they any good? No idea. But they're like $3 shipped from a known brand and have good things on paper.
Or maybe something like this: https://www.aliexpress.com/item/3256804852581959.html
Only downside is you've gotta wait 1-3 weeks to get them.