Too good to be true? New to Amazon so burst my bubble if need be.

I’m in the hair industry and have wholesale access to professional hair care. Industry standard is we buy hair products wholesale and then sell them for twice the cost or more brick and mortar style. Ive been thinking I want to sell these products online. I see the company is already selling on Amazon for double what I bought it for. I’m thinking it would be great to sell it a couple dollars cheaper. Amazon says it’s selling. Is this too good to be true? Are there certain e commerce rules I don’t know about? Thanks for reading:)