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.
I've had the cheapest ones and the nicest ones. Now I just buy whatever decent ones are on sale because they're all trash and either my dog is going to eat them or they're just going to quit working.