Click here for an archive of Cramer's "Mad Money" recaps. After experiencing a week like last week, people have a tendency to bargain hunt, Jim Cramer told viewers of his "Mad Money" TV show Monday. However, when you go shopping for damaged goods, while looking at the stock's price tag, remember to also take the company's fundamentals into consideration, he said. Everyone shops for damaged stocks, said Cramer. But if you don't know how to do it right, you could run into some problems and end up losing money, he said. Amazon.com ( AMZN), a stock that is being beaten up, is an example of a stock that is not worth buying, he said. Though some investors might want to buy it because it's so cheap, Cramer said that a stock that goes down doesn't necessarily become cheaper. People should first compare the damaged stock with other stocks of similar businesses, he advised. Although Amazon sells a lot of products, in the end it's a bookstore. "If you want to know whether it's worth buying, forget that it sells anything else," Cramer said. "Keep it simple." Comparing it with Borders ( BGP) and Barnes & Noble ( BKS), Cramer said that Amazon is expensive. Amazon is a $14 billion company, therefore people should realize up-front that it's too big to be a takeover target. Borders, on the other hand, is a $1.1 billion company, and Barnes & Noble is a $2.2 billion company. A stock's value equals its growth and its price-to-earnings multiple. With the company's multiple, you can compare stock prices. Amazon sells at 44 times earnings, which is expensive, Cramer said. Barnes & Noble sells at 15 times earnings, and Borders sells at 12 times earnings. Next, after looking at each company's growth, Cramer said Amazon is not cheap when compared with the other two companies.