Except that TEMU has a high percentage of scam or questionable products. What you see in the listing isn't necessarily what you get. For example, I've heard of people buying dog beds for a large dog and getting something a chihuahua can't use.
When you do get what you expect, the quality is almost always very poor.
so many chinese repackage sellers are sourcing from leftover reels used by film crews. These films can be still considered usable, but the storage time/conditions and usable ISO of each roll can vary greatly.
I wish I didn’t have to distinguish between film suppliers, but..... Aside from CineStill, brands like Film Photography Project and Reflx Lab are generally more reliable. If you’re referring to individual sellers on platforms like TEMU or AliExpress as post title, the prices can be better but I recommend testing one or two rolls first to verify the quality.