You can find suitable headbands on aliexpress for 2bucks or less though this is pretty creative lol

Rosewood and ebony cups available too for the detachable, wish they had this before I got a th-x00 second hand. Love the bass quality of the fostex driver family.

Can’t comment on the sundara closed or k371s, but if you’re searching for value at that specific price point for more options and willing to look in the second hand market then Sony MDR-1AM2 for example can be commonly found under 200 and even around 100 sometimes. As for brand new I recall Meze 99 neos on sale before at 150 as well.