Go with Ali Express. Parent alibaba is the chinese online costco equivalent for business bulk sales... Ali express is the outlet for retail & smaller quantities to individuals.
They sell everything that can be shipped. Eg: I got a pair of trauma scissors of professional quality for a fraction of the brand name. (used by emergency medical providers) pretty sure it is identical to brand name other than not having a brand.
Their major wing is alibaba which supplies tons of businesses with bulk stuff (some of which gets store (or occasionally company) branded after the fact.
With a few exceptions, the sellers are reliable. All the better parent companies will refund you if you are prompt in your complaints, but like amazon, you must learn to work their system. Past experience with ALL online buying, is pay attention to the ads.
Both walmart and amazon (and many big sellers have gone this route) have resellers as well as direct sales and some are skeezy. Usually, the parent conpany will make you whole but it can be a pain.
When amazon started they were a very different (much smaller) company and i was much more trusting. I have had an amazon account from almost the beginning when i used it to buy *books*, which was what they originally sold.. I used to love them. Before they turned into super corporate and terrifying RL "MomCorp" (Futurama reference)
Caveat emptor: resellers are hard to manage and a few bad ones slip thru everywhere. The difference between good places to buy and bad is does the parent company make you whole and are most sellers vetted enough that most are legit?
Around christmas there was this "company" with amazing clothes at fabulous prices. We started to realize ALL the models were AI - the men all had AI "noble face" with lovely beards and "soulful" eyes. The women looked almost elven. Too perfect. Then we started research. Then they were gone.
Apparently, they morph into a new name & business regularly after taking people's credit card info.
Some of the clothes were from real pictures stolen from legit sites (with significantly higher prices). Interestingly, they were not dirt cheap, just cheap enough to be a great deal and lull you into trust. Expensive enough to be real. Other (filler?) clothes appear to be generated from textures found online.
It was a very polished scam. Because it was *allegedly* shipping from China, it would take a while before you realized you had been robbed. Even without the cc stealing, just the sales would have made them a chunk, especially if they were not shipping products.
If Temu is at all legit, they will develop customer protections and some vendor control. I dont get the feeling this is their "business" plan as of now though. Yes, criminal enterprises do have business models. Just look at gambling entities for understanding how they are meant to work. Hint: the house always wins.