Question about listing products

Just a quick 1 if i want sell something and get a invoice from wholesaler am i guaranteed to be able to sell it?

Also if only amazon is selling a product am i best stay away from that product?

Skip those products if amazon is in the buy box. You can rely on keepa for important data.

Yes, refrain from competing with Amazon for the buy box. It’s better to stay away. Instead, buy products from websites, wholesalers, or distributors whose invoices Amazon accepts.

There is never any guarantee that you will be able to sell a specific product on Amazon. It is a common practice for sellers to avoid listings where Amazon has the BuyBox.