Disclaimer: I'm not an audiophile
I think these are fantastic mid-range BT ANC earbuds. I bought one initially for $32. Then I bought another as a spare and for travel. Then I bought 3 more at $26ish to give away. I think they caught on and the price has been steady at around ~$50 since, but recently sropped by $5.
I described them briefly here: https://www.ozbargain.com.au/node/777686. I'm travelling and have already lost one bud, but you can use one bud independently.
These are kinda a one trick pony and only great with bass-heavy music. I can't think of any better ANC buds with DD and BA drivers for under $50.
I'm currently listenting to MICHAEL by Killer Mike, and the sub-bass is chef's kiss
They look a little big for my ears
https://i.ebayimg.com/images/g/Cc4AAOSwti9kab57/s-l1200.webp