When you buy Amazon stock, you'll pay a commission and a spread. As of Feb 22, 2019 the commission per share was $27.50. Plus, you'll have to pay a spread. That's the difference between the bid price (the highest price at which someone is willing to sell their shares) and the ask price (the lowest price at which someone is willing to sell their shares). As of Feb 22, 2019 the asking price for one share of Amazon was $3,225 while the bid price was $3,210.