Technology that ends up at the Dollar store

You have got to wonder about those little electronic gadgets that end up at the local Dollar store, I know that I do. Those little tiny FM radios, the mobile cell boosters that claim to increase your cell phone coverage range and the LED book lights. I must admit to buying the FM radio for when the power goes out at the house and found out that most of the stations that I could receive were gospel stations. All I can say is "thank you" XM satellite radio (which we get in our truck). The radio is pretty much useless. I am not sure about those other technology items.