The Black Friday Shopping (after Thanksgiving Day) and Cyber Monday events in the US is the start of the Christmas shopping where huge sales discounts are being offered by various traditional and online shopping retail merchants.
Whether there are holiday sale events or just shopping in ordinary days, it is a good practice to check product reviews online about the merchants and products in your list. Product reviews help consumers on their buying decisions, able to get personal recommendations from fellow consumers, other shopping experiences, and buying tips.
Here are some online sources for shopping reviews:
Top Ten Reviews