Amazon Prime Day has begun. The online retail giant is offering Amazon Prime members thousands of deals through the 11th on things like laptops, tablets, headphones, and everyday essentials. The annual event brings in billions of dollars in global sales and retailers see an immediate boost in e-commerce activity. Consumer experts warn of "price anchoring" where some sellers jack up prices before Prime Day, then offer what appears to be a discount that is actually the product's normal price or even higher. To get the most out of the sale make a wish list, set a budget, and comparison shop.