Text: Bring along an extra bag to hold your purchases; compare prices at home to make sure you find actual bargains; find out beforehand the names of local authorized dealers, especially if you want to buy high-priced electronic equipment and wish to reduce the risk of purchasing counterfeit merchandise; and give yourself plenty of time to shop so you can compare prices.
Entailment: There is a risk of purchasing conterfeit merchandise from dealers.
Contradiction: You can almost instantly find the best deals with no prior research.