I would say advertise the whole store. Because you have the penny auctions and the games, it would give you more fire power with everything to be seen than just a few items.
You could give a few examples to show how good of a deal they would be getting.Like if you were out hunting pheasants would you use a rifle with one shot or a shot gun to give you a big pattern to hit the bird,with a shot gun you are more likely to get the bird than with a rifle.