Distinguish between leader pricing and bait pricing.
These are two very different things.
Leader pricing is the practice of offering legitimate sale prices on popular items to get people to come into a store. It is typically used to get people to patronize one establishment rather than others. It is also used to get people into a store where they might also buy other items that are not on sale and have higher profit margins.
Bait pricing, by contrast, is deceptive. The store advertises a really good deal on something but is typically not really offering that deal. Instead, when a person comes in to try to take advantage of the deal, the staff uses high pressure techniques to try to get the customer to buy something that is not a good deal at all.
In this way, leader pricing is a legitimate use of low prices while bait pricing is deceptive.