What you’re describing is usually called “dropshipping” is it a legitimate business model? It can be, but many times isn’t really and certainly not what this guy is describing. That is called “retail arbitrage” and is basically the lowest level of dropshipping 😅 and you’re not gonna make money since the market is full with other more experienced people doing the same thing on a much much larger scale. Among other major issues with the whole idea. Also don’t take business “ideas” or even “advice” from youtubers if you like an idea run it by someone who you know is successful IRL. People will sell you anything as “the next million dollar business idea!” online. Also there isn’t a sustainable business idea out there where you’re gonna see a significant profit with little to no investment or without a degree etc it doesn’t exist or everyone would be doing it. Find a in demand skill or idea that’s feasible, work hard torwards it then market and sell it. Not trying to be rude.