In no particular order: Bluedio T2/T2+, Bluedio T3/T3+, Bluedio Vinyl, Bluedio T4, Ausdom M06, Ausdom H8, Avantree Audition
The prices of all those I listed are under $100, and offer good quality, good sound, and bang for the buck. Some have NFC and aptX, and some are just bluetooth. The Bluedio + models have a built-in microSD card that can play music right from the card. The Bluedio T3/T3+, T4, and Vinyl are metal construction. Best battery life is Bluedio T2/T2+, T3/T3+, & T4. Most can be used in wireless or hard wired mode.
Obviously there are many other choices, but the ones in the list are ones I've either currently or previously owned, listened to, or know someone who does and they've reported being very happy with them. The only exceptions are the T2 and T3, as my experience is with the + version. But the + versions are literally identical with the only exception being the addition of the microSD function.