In your experience, how do the really cheap (presumption on my part, not intended as criticism!) Apple Watch bands sold on Aliexpress, or eBay, or Shein, or ... hold up over time?
I bought one such early days (2017) - a knockoff of the sport band with pin-and-tuck closure. The supposedly stainless steel base of the pin exposed to my wrist rusted/corroded within a month, and after that, I swore off cheap bands - Apple – as described in
Wearing Your Apple Watch (what the bands are made of) – has been very careful w.r.t. the materials and potential allergic reactions for these products you're expected to wear nearly continuously, and – for me – that care has value.
The other question aside from skin reactions is quality: good fit & finish? Durable?
It's not as if Apple doesn't goof (sometimes spectacularly; cf.
FineWoven iPhone cases are very bad (TheVerge)), but as a friend once opined to me, "it's not 'you get what you pay for' - it's 'you get
no more than you pay for'" (i.e., sometimes you get considerably less).