[jeffbee]

> It's not ethical for someone to clone a more expensive version of some Amazon listing onto another site, and then order stuff from Amazon to whoever buys the listing, pocketing the difference

This is textbook marketing. You connect buyers and sellers and take a profit. You are bringing the product to the attention of a previously-unaware consumer. I can't imagine what you think is not ethical about this.

[LoganDark]

It's okay when the product they're selling is their own product. Say, Amazon fulfillment. The manufacturer sends their products to an Amazon warehouse and then Amazon handles shipping them out. But if a seller claims to have their own product but then just goes to another listing and buys it to the customer, that is what I think is unethical.

IMHO reselling is OK only if it's disclosed what the original brand of the product is... but even reselling doesn't necessarily imply dropshipping.