Buy Now means you can purchase Products immediately at the Fixed price. Here,

• If a bidder wants to buy now the product, click bid now
• Then Enter the required quantity in Quantity textbox and click buy now.
• Click commit to purchase
• And then Enter the credit card details
• Finally Your products are purchased successfully

Fig 4.0: Buy Now 

Fig 4.1: Enter Quantity 

Fig 4.2: Click Commit to Purchase 

Fig 4.3: Enter Credit Card Details