How does this business model work? Is this a scam?

There is this business next to my house. You give them the amazon or flipkart link of the product, they will get the product for you at 12% discount over the price that’s shown on either of the platforms. And they say 2 weeks delivery time for any product that we order. I have been thinking of getting iPhone 15 from them. So on Flipkart it’s rs. 58,999 and they are offering me it for rs. 51,000. They promised me they will give me bill and warranty receipt from Flipkart. Now this sounds like a really good deal, but I want to know if it’s a genuine deal because I have never seen a business model like this before. Someone please help me out with this!!! 😭😭