Whether in the physical world or online selling, any sales tactic that does not fool the public is considered part of fair competition.
As an example, a store that sells a late model car for the ridiculously low price of $9.99 will certainly have a lot of inquiries, at the very least. For as long as that store really does sell a fairly new car for the crazy sum, they can bring in potential buyers. Just one car is enough, and whoever wins the impossible bargain can thank his or her lucky stars. Everyone else can take a look at the other nice cars on the lot, which may not be quite as cheap, but which are solid bargains nonetheless.
That one car sold will not necessarily be a loss for the store as it can be considered part of their advertising expense.
Since thousands may be interested but only one will get to buy the car, what the seller does to entice his other possible clients will determine whether he can sell the other vehicles in stock, or get lynched and run out or town.
Obviously, if the seller has other good to great deals, then the potential buyers will still shop around and maybe buy.
This tactic works just as well online as with a physical store.
Online sellers can announce that they are marking down some items to ridiculously low prices, which they then sell on a first come, first served basis. The other items in his online shop will also be sold, but at a smaller discount.
Selling a few items at a loss or at break even cost is the bait that brings in the buyers. Hopefully, a surge in sales will be your reward for a neat marketing gimmick.
