We can buy Apple products online but we need to purchase from reputable e-commerce sites like flipkart, cellbuddy, amazon. There may be other major e-commerce portals also around the world you can buy from them as well. Just do a check of reviews and rating of the seller. If the seller has low rating or no rating. I suggest try a different seller. However the top website’s do a quality check so you should have no problem.
I have myself been ordering from cell buddy for past many years and had no trouble ever.